diff --git a/headers/os/drivers/disk_device_manager.h b/headers/os/drivers/disk_device_manager.h
index ba59f44269..b86641bf8c 100644
--- a/headers/os/drivers/disk_device_manager.h
+++ b/headers/os/drivers/disk_device_manager.h
@@ -14,9 +14,11 @@
 extern "C" {
 #endif
 
-// C API partition representation
-// Fields marked [sys] are set by the system and are not to be changed by
-// the disk system modules.
+/** 	\brief C API partition representation
+ *
+ * 	Fields marked [sys] are set by the system and are not to be changed by
+ * 	the disk system modules.
+ */
 typedef struct partition_data {
 	partition_id	id;				// [sys]
 	off_t			offset;
diff --git a/headers/private/kernel/disk_device_manager/KDiskDeviceJob.h b/headers/private/kernel/disk_device_manager/KDiskDeviceJob.h
index b226588f4b..560c8c749a 100644
--- a/headers/private/kernel/disk_device_manager/KDiskDeviceJob.h
+++ b/headers/private/kernel/disk_device_manager/KDiskDeviceJob.h
@@ -4,6 +4,7 @@
 #define _K_DISK_DEVICE_JOB_H
 
 #include "disk_device_manager.h"
+#include <KPartitionVisitor.h>
 
 struct user_disk_device_job_info;
 
@@ -12,19 +13,41 @@ namespace DiskDevice {
 
 class KDiskDeviceJobQueue;
 
+/**
+ * Represents some action executed on the disk device.
+ * 
+ * - 
+ */
 class KDiskDeviceJob {
 public:
+	/**
+	 * Creates a new job
+	 * 
+	 * \param type actual type of the job (see DiskDeviceDefs.h for details)
+	 * \param partitionID the partition/device on which the action should be executed
+	 * \param scopeID partition/device which is the highest in the hierarchy (i.e. closest
+	 * to the root) that can be affected by the action
+ * 		- every descendant of this partition is marked busy and all ancestors are marked descendant-
+	busy
+	 */
 	KDiskDeviceJob(uint32 type, partition_id partitionID,
 				   partition_id scopeID = -1);
 	virtual ~KDiskDeviceJob();
 
+	/**
+	 * Unique identification of the job
+	 */
 	disk_job_id ID() const;
 
 	void SetJobQueue(KDiskDeviceJobQueue *queue);
 	KDiskDeviceJobQueue *JobQueue() const;
 
+	/**
+	 * Gets actual type of the action
+	 */
 	uint32 Type() const;
 
+	
 	void SetStatus(uint32 status);
 	uint32 Status() const;
 
@@ -54,9 +77,25 @@ public:
 		// triggers a notification
 	float Progress() const;
 
+	
 	status_t GetInfo(user_disk_device_job_info *info);
 	status_t GetProgressInfo(disk_device_job_progress_info *info);
 
+	/**
+	 * Do the actual work of the job.
+	 * 
+	 * - is supposed to be implemented in descendants
+	 * - doesn't have any parameter - every operation needs different ones -> they're passed
+	 * 		to the constructor
+	 * - the implementations will 
+	 * 		- check the parameters given in constructor (e.g. if given partition exists...)
+	 * 		- check whether the partition has needed disk system (its own or parent - depends
+	 * 			on the operation)
+	 * 		- using the disk system, validate the operation for given params
+	 * 		- finally execute the action
+	 * 
+	 * \return B_OK when everything went OK, some error otherwise
+	 */
 	virtual status_t Do() = 0;
 
 private:
@@ -76,6 +115,29 @@ private:
 	float				fProgress;
 
 	static disk_job_id	fNextID;
+	
+private:
+	/**
+	 * Visitor which checks if every descendant of given partition is busy or descendant-busy
+	 */
+	struct IsNotBusyVisitor	: KPartitionVisitor {
+		virtual bool VisitPre(KPartition * partition);
+	};
+	IsNotBusyVisitor fNotBusyVisitor;
+	
+protected: 
+	//some stuff useful for all descendants
+		
+	/**
+	 * Checks if there's any descendant which is not busy/descendant-busy.
+	 * 
+	 * - the condition of busy descendant is common for many disk device operations ->
+	 * 		many jobs can use this
+	 * 
+	 * \param partition the root of checked subtree of the whole partition hieararchy
+	 */
+	bool isPartitionNotBusy( KPartition * partition );	
+	
 };
 
 } // namespace DiskDevice
diff --git a/headers/private/kernel/disk_device_manager/KDiskSystem.h b/headers/private/kernel/disk_device_manager/KDiskSystem.h
index 76871115ff..f789a5d7c2 100644
--- a/headers/private/kernel/disk_device_manager/KDiskSystem.h
+++ b/headers/private/kernel/disk_device_manager/KDiskSystem.h
@@ -13,6 +13,7 @@ namespace DiskDevice {
 class KDiskDeviceJob;
 class KPartition;
 
+///	\brief Common ancestor for disk system add-on wrappers
 class KDiskSystem {
 public:
 	KDiskSystem(const char *name);
diff --git a/headers/private/kernel/disk_device_manager/KFileSystem.h b/headers/private/kernel/disk_device_manager/KFileSystem.h
index ab13cf2eaa..dbd5a227d0 100644
--- a/headers/private/kernel/disk_device_manager/KFileSystem.h
+++ b/headers/private/kernel/disk_device_manager/KFileSystem.h
@@ -13,6 +13,7 @@ struct file_system_module_info;
 namespace BPrivate {
 namespace DiskDevice {
 
+///	\brief Wrapper for the C interface of a filesystem add-on.
 class KFileSystem : public KDiskSystem {
 public:
 	KFileSystem(const char *name);
diff --git a/headers/private/kernel/disk_device_manager/KPartition.h b/headers/private/kernel/disk_device_manager/KPartition.h
index a14f49c634..aa55b0a0cd 100644
--- a/headers/private/kernel/disk_device_manager/KPartition.h
+++ b/headers/private/kernel/disk_device_manager/KPartition.h
@@ -21,6 +21,7 @@ class KPath;
 class KPhysicalPartition;
 class KShadowPartition;
 
+///	\brief Class representing a single partition.
 class KPartition {
 public:
 	KPartition(partition_id id = -1);
diff --git a/headers/private/kernel/disk_device_manager/KPartitioningSystem.h b/headers/private/kernel/disk_device_manager/KPartitioningSystem.h
index 6f8609bdb0..737575fbba 100644
--- a/headers/private/kernel/disk_device_manager/KPartitioningSystem.h
+++ b/headers/private/kernel/disk_device_manager/KPartitioningSystem.h
@@ -10,6 +10,11 @@ struct partition_module_info;
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * 	\brief Wrapper for the C interface of a partitioning system add-on.
+ *
+ * 	See \ref ddm_modules.h for better description of the interface.
+ */
 class KPartitioningSystem : public KDiskSystem {
 public:
 	KPartitioningSystem(const char *name);
@@ -19,7 +24,9 @@ public:
 
 	// Scanning
 
+	/// Try to identify a given partition
 	virtual float Identify(KPartition *partition, void **cookie);
+	/// Scan the partition
 	virtual status_t Scan(KPartition *partition, void *cookie);
 	virtual void FreeIdentifyCookie(KPartition *partition, void *cookie);
 	virtual void FreeCookie(KPartition *partition);
@@ -27,88 +34,132 @@ public:
 
 	// Querying
 
+	/// Check whether the add-on supports repairing this partition.
 	virtual bool SupportsRepairing(KPartition *partition, bool checkOnly,
 								   bool *whileMounted);
+	/// Check whether the add-on supports resizing this partition.
 	virtual bool SupportsResizing(KPartition *partition, bool *whileMounted);
+	/// Check whether the add-on supports resizing children of this partition.
 	virtual bool SupportsResizingChild(KPartition *child);
+	/// Check whether the add-on supports moving this partition.
 	virtual bool SupportsMoving(KPartition *partition, bool *isNoOp);
+	/// Check whether the add-on supports moving children of this partition.
 	virtual bool SupportsMovingChild(KPartition *child);
+	/// Check whether the add-on supports setting name of this partition.
 	virtual bool SupportsSettingName(KPartition *partition);
+	/// Check whether the add-on supports setting name to content of this partition.
 	virtual bool SupportsSettingContentName(KPartition *partition,
 											bool *whileMounted);
+	/// Check whether the add-on supports setting type of this partition.
 	virtual bool SupportsSettingType(KPartition *partition);
+	/// Check whether the add-on supports setting parameters of this partition.
 	virtual bool SupportsSettingParameters(KPartition *partition);
+	/// Check whether the add-on supports setting parameters to content of this partition.
 	virtual bool SupportsSettingContentParameters(KPartition *partition,
 												  bool *whileMounted);
+	/// Check whether the add-on supports initializing this partition.
 	virtual bool SupportsInitializing(KPartition *partition);
+	/// Check whether the add-on supports initializing a child of this partition.
 	virtual bool SupportsInitializingChild(KPartition *child,
 										   const char *diskSystem);
+	/// Check whether the add-on supports creating children of this partition.
 	virtual bool SupportsCreatingChild(KPartition *partition);
+	/// Check whether the add-on supports deleting children of this partition.
 	virtual bool SupportsDeletingChild(KPartition *child);
+	/// Check whether the add-on is a subsystem for a given partition.
 	virtual bool IsSubSystemFor(KPartition *partition);
 
+	/// Validates parameters for resizing a partition
 	virtual bool ValidateResize(KPartition *partition, off_t *size);
+	/// Validates parameters for resizing a child partition
 	virtual bool ValidateResizeChild(KPartition *child, off_t *size);
+	/// Validates parameters for moving a partition
 	virtual bool ValidateMove(KPartition *partition, off_t *start);
+	/// Validates parameters for moving a child partition
 	virtual bool ValidateMoveChild(KPartition *child, off_t *start);
+	/// Validates parameters for setting name of a partition
 	virtual bool ValidateSetName(KPartition *partition, char *name);
+	/// Validates parameters for setting name to content of a partition
 	virtual bool ValidateSetContentName(KPartition *partition, char *name);
+	/// Validates parameters for setting type of a partition
 	virtual bool ValidateSetType(KPartition *partition, const char *type);
+	/// Validates parameters for setting parameters of a partition
 	virtual bool ValidateSetParameters(KPartition *partition,
 									   const char *parameters);
+	/// Validates parameters for setting parameters to content of a partition
 	virtual bool ValidateSetContentParameters(KPartition *parameters,
 											  const char *parameters);
+	/// Validates parameters for initializing a partition
 	virtual bool ValidateInitialize(KPartition *partition, char *name,
 									const char *parameters);
+	/// Validates parameters for creating child of a partition
 	virtual bool ValidateCreateChild(KPartition *partition, off_t *start,
 									 off_t *size, const char *type,
 									 const char *parameters, int32 *index);
+	/// Counts partitionable spaces on a partition
 	virtual int32 CountPartitionableSpaces(KPartition *partition);
+	/// Retrieves a list of partitionable spaces on a partition
 	virtual status_t GetPartitionableSpaces(KPartition *partition,
 											partitionable_space_data *buffer,
 											int32 count,
 											int32 *actualCount = NULL);
 
+	/// Iterates through supported partition types
 	virtual status_t GetNextSupportedType(KPartition *partition, int32 *cookie,
 										  char *type);
+	/// Translates the "pretty" content type to an internal type
 	virtual status_t GetTypeForContentType(const char *contentType,
 										   char *type);
 
 	// Shadow partition modification
 
+	/// Calls for additional modifications when shadow partition is changed
 	virtual status_t ShadowPartitionChanged(KPartition *partition,
 											uint32 operation);
 
 	// Writing
 
+	/// Repairs a partition
 	virtual status_t Repair(KPartition *partition, bool checkOnly,
 							KDiskDeviceJob *job);
+	/// Resizes a partition
 	virtual status_t Resize(KPartition *partition, off_t size,
 							KDiskDeviceJob *job);
+	/// Resizes child of a partition
 	virtual status_t ResizeChild(KPartition *child, off_t size,
 								 KDiskDeviceJob *job);
+	/// Moves a partition
 	virtual status_t Move(KPartition *partition, off_t offset,
 						  KDiskDeviceJob *job);
+	/// Moves child of a partition
 	virtual status_t MoveChild(KPartition *child, off_t offset,
 							   KDiskDeviceJob *job);
+	/// Sets name to a partition
 	virtual status_t SetName(KPartition *partition, char *name,
 							 KDiskDeviceJob *job);
+	/// Sets name to content of a partition
 	virtual status_t SetContentName(KPartition *partition, char *name,
 									KDiskDeviceJob *job);
+	/// Sets type of a partition
 	virtual status_t SetType(KPartition *partition, char *type,
 							 KDiskDeviceJob *job);
+	/// Sets parameters of a partition
 	virtual status_t SetParameters(KPartition *partition,
 								   const char *parameters,
 								   KDiskDeviceJob *job);
+	/// Sets parameters to content of a partition
 	virtual status_t SetContentParameters(KPartition *partition,
 										  const char *parameters,
 										  KDiskDeviceJob *job);
+	/// Creates a child partition
 	virtual status_t CreateChild(KPartition *partition, off_t offset,
 								 off_t size, const char *type,
 								 const char *parameters, KDiskDeviceJob *job,
 								 KPartition **child = NULL,
 								 partition_id childID = -1);
+	/// Deletes a child partition
 	virtual status_t DeleteChild(KPartition *child, KDiskDeviceJob *job);
+	/// Initializes a partition with this partitioning system
 	virtual status_t Initialize(KPartition *partition, const char *name,
 								const char *parameters, KDiskDeviceJob *job);
 
diff --git a/headers/private/kernel/disk_device_manager/KPhysicalPartition.h b/headers/private/kernel/disk_device_manager/KPhysicalPartition.h
index e3780002b4..a254a1ce92 100644
--- a/headers/private/kernel/disk_device_manager/KPhysicalPartition.h
+++ b/headers/private/kernel/disk_device_manager/KPhysicalPartition.h
@@ -12,6 +12,7 @@ class KDiskDevice;
 class KDiskSystem;
 class KShadowPartition;
 
+/// \brief Class representing an existing partition.
 class KPhysicalPartition : public KPartition {
 public:
 	KPhysicalPartition(partition_id id = -1);
diff --git a/headers/private/kernel/disk_device_manager/KShadowPartition.h b/headers/private/kernel/disk_device_manager/KShadowPartition.h
index d9a8817e86..7a52134ba6 100644
--- a/headers/private/kernel/disk_device_manager/KShadowPartition.h
+++ b/headers/private/kernel/disk_device_manager/KShadowPartition.h
@@ -11,6 +11,9 @@ namespace DiskDevice {
 
 class KPhysicalPartition;
 
+///	\brief Class representing a shadow of an existing partition.
+///
+///	See \ref path_kernel_structures for more information.
 class KShadowPartition : public KPartition, private KPartitionListener {
 public:
 	KShadowPartition(KPhysicalPartition *physicalPartition);
diff --git a/src/system/kernel/disk_device_manager/Jamfile b/src/system/kernel/disk_device_manager/Jamfile
index 6d21c3a38a..67ac109daa 100644
--- a/src/system/kernel/disk_device_manager/Jamfile
+++ b/src/system/kernel/disk_device_manager/Jamfile
@@ -42,7 +42,9 @@ KernelMergeObject kernel_disk_device_manager.o :
 	KRepairJob.cpp
 	KResizeJob.cpp
 	KScanPartitionJob.cpp
+	KSetNameJob.cpp
 	KSetParametersJob.cpp
+	KSetTypeJob.cpp
 	KUninitializeJob.cpp
 
 	# utilities
diff --git a/src/system/kernel/disk_device_manager/KDiskDeviceJob.cpp b/src/system/kernel/disk_device_manager/KDiskDeviceJob.cpp
index b28fb4f15c..60fc883c32 100644
--- a/src/system/kernel/disk_device_manager/KDiskDeviceJob.cpp
+++ b/src/system/kernel/disk_device_manager/KDiskDeviceJob.cpp
@@ -243,3 +243,17 @@ KDiskDeviceJob::_NextID()
 // fNextID
 disk_job_id KDiskDeviceJob::fNextID = 0;
 
+
+// IsNotBusyVisitor
+bool KDiskDeviceJob::IsNotBusyVisitor::VisitPre( KPartition * partition ) {
+	return !(partition->IsBusy() || partition->IsDescendantBusy());
+}
+
+
+bool KDiskDeviceJob::isPartitionNotBusy( KPartition * partition ) {
+	if( !partition ) {
+		return false; 
+	}
+	
+	return partition->VisitEachDescendant(&fNotBusyVisitor);
+}
diff --git a/src/system/kernel/disk_device_manager/KDiskDeviceJobFactory.cpp b/src/system/kernel/disk_device_manager/KDiskDeviceJobFactory.cpp
index 0876eb64c3..7aaf9bc95e 100644
--- a/src/system/kernel/disk_device_manager/KDiskDeviceJobFactory.cpp
+++ b/src/system/kernel/disk_device_manager/KDiskDeviceJobFactory.cpp
@@ -10,8 +10,18 @@
 
 #include "KDiskDeviceJob.h"
 #include "KDiskDeviceJobFactory.h"
+
+#include "KCreateChildJob.h"
+#include "KDefragmentJob.h"
+#include "KDeleteChildJob.h"
+#include "KInitializeJob.h"
+#include "KMoveJob.h"
+#include "KRepairJob.h"
 #include "KResizeJob.h"
 #include "KScanPartitionJob.h"
+#include "KSetNameJob.h"
+#include "KSetParametersJob.h"
+#include "KSetTypeJob.h"
 #include "KUninitializeJob.h"
 
 using namespace std;
@@ -30,8 +40,7 @@ KDiskDeviceJobFactory::~KDiskDeviceJobFactory()
 KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateDefragmentJob(partition_id partitionID)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KDefragmentJob(partitionID);
 }
 
 
@@ -39,8 +48,7 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateRepairJob(partition_id partitionID,
 	bool checkOnly)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KRepairJob(partitionID, checkOnly);
 }
 
 
@@ -56,8 +64,8 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateMoveJob(partition_id parentID, partition_id partitionID,
 	off_t offset, const partition_id *contentsToMove, int32 contentsToMoveCount)
 {
-	// not implemented
-	return NULL;
+	// TODO: this is wierd, what in hell are contentsToMove etc?
+	return new(nothrow) KMoveJob(parentID, partitionID, offset);
 }
 
 
@@ -65,8 +73,7 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateSetNameJob(partition_id parentID,
 	partition_id partitionID, const char *name)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KSetNameJob(parentID, partitionID, name, 0);
 }
 
 
@@ -74,8 +81,7 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateSetContentNameJob(partition_id partitionID,
 	const char *name)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KSetNameJob(0, partitionID, 0, name);
 }
 
 
@@ -83,8 +89,7 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateSetTypeJob(partition_id parentID,
 	partition_id partitionID, const char *type)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KSetTypeJob(parentID, partitionID, type);
 }
 
 
@@ -92,8 +97,7 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateSetParametersJob(partition_id parentID,
 	partition_id partitionID, const char *parameters)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KSetParametersJob(parentID, partitionID, parameters, 0);
 }
 
 
@@ -101,8 +105,7 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateSetContentParametersJob(partition_id partitionID,
 	const char *parameters)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KSetParametersJob(0, partitionID, 0, parameters);
 }
 
 
@@ -110,8 +113,7 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateInitializeJob(partition_id partitionID,
 	disk_system_id diskSystemID, const char *name, const char *parameters)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KInitializeJob(partitionID, diskSystemID, name, parameters);
 }
 
 
@@ -127,8 +129,7 @@ KDiskDeviceJobFactory::CreateCreateChildJob(partition_id partitionID,
 	partition_id childID, off_t offset, off_t size, const char *type,
 	const char *parameters)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KCreateChildJob(partitionID, childID, offset, size, type, parameters);
 }
 
 
@@ -136,8 +137,7 @@ KDiskDeviceJob *
 KDiskDeviceJobFactory::CreateDeleteChildJob(partition_id parentID,
 	partition_id partitionID)
 {
-	// not implemented
-	return NULL;
+	return new(nothrow) KDeleteChildJob(parentID, partitionID);
 }
 
 
diff --git a/src/system/kernel/disk_device_manager/KPartitioningSystem.cpp b/src/system/kernel/disk_device_manager/KPartitioningSystem.cpp
index 045bcef052..d3d4ef84f5 100644
--- a/src/system/kernel/disk_device_manager/KPartitioningSystem.cpp
+++ b/src/system/kernel/disk_device_manager/KPartitioningSystem.cpp
@@ -1,4 +1,7 @@
-// KPartitioningSystem.cpp
+/**	\file KPartitioningSystem.cpp
+ *
+ * 	\brief Implementation of \ref KPartitioningSystem class
+ */
 
 #include <fcntl.h>
 #include <stdlib.h>
@@ -499,17 +502,17 @@ KPartitioningSystem::Resize(KPartition *partition, off_t size,
 		return B_ENTRY_NOT_FOUND;
 	// lock partition and open partition device
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
-	KPartition *_partition = manager->ReadLockPartition(partition->ID());
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
 	if (!_partition)
 		return B_ERROR;
 	int fd = -1;
 	{
 		PartitionRegistrar registrar(_partition, true);
 		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
-		DeviceReadLocker locker(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
 		if (partition != _partition)
 			return B_ERROR;
-		status_t result = partition->Open(O_RDONLY, &fd);
+		status_t result = partition->Open(O_RDWR, &fd);
 		if (result != B_OK)
 			return result;
 	}
@@ -526,25 +529,24 @@ KPartitioningSystem::ResizeChild(KPartition *child, off_t size,
 								 KDiskDeviceJob *job)
 {
 	// check parameters
-	if (!child || !job || size < 0)
+	if (!child || !job || !child->Parent() || size < 0)
 		return B_BAD_VALUE;
 	if (!fModule->resize_child)
 		return B_ENTRY_NOT_FOUND;
 	// lock partition and open (parent) partition device
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
-	KPartition *_partition = manager->ReadLockPartition(child->ID());
+	KPartition *_partition = manager->WriteLockPartition(child->ID());
+	KPartition *_parent = manager->WriteLockPartition(child->Parent()->ID());
 	if (!_partition)
 		return B_ERROR;
 	int fd = -1;
 	{
 		PartitionRegistrar registrar(_partition, true);
 		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
-		DeviceReadLocker locker(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
 		if (child != _partition)
 			return B_ERROR;
-		if (!child->Parent())
-			return B_BAD_VALUE;
-		status_t result = child->Parent()->Open(O_RDONLY, &fd);
+		status_t result = child->Parent()->Open(O_RDWR, &fd);
 		if (result != B_OK)
 			return result;
 	}
@@ -560,8 +562,32 @@ status_t
 KPartitioningSystem::Move(KPartition *partition, off_t offset,
 						  KDiskDeviceJob *job)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!partition || !job)
+		return B_BAD_VALUE;
+	if (!fModule->move)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (partition != _partition)
+			return B_ERROR;
+		status_t result = partition->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->move(fd, partition->ID(), offset, job->ID());
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // MoveChild
@@ -569,8 +595,33 @@ status_t
 KPartitioningSystem::MoveChild(KPartition *child, off_t offset,
 							   KDiskDeviceJob *job)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!child || !job || !child->Parent())
+		return B_BAD_VALUE;
+	if (!fModule->move_child)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open (parent) partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(child->ID());
+	KPartition *_parent = manager->WriteLockPartition(child->Parent()->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (child != _partition)
+			return B_ERROR;
+		status_t result = child->Parent()->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->move_child(fd, child->Parent()->ID(), child->ID(), offset, job->ID());
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // SetName
@@ -578,8 +629,32 @@ status_t
 KPartitioningSystem::SetName(KPartition *partition, char *name,
 							 KDiskDeviceJob *job)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!partition || !job || !name)
+		return B_BAD_VALUE;
+	if (!fModule->set_name)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (partition != _partition)
+			return B_ERROR;
+		status_t result = partition->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->set_name(fd, partition->ID(), name, job->ID());
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // SetContentName
@@ -587,8 +662,32 @@ status_t
 KPartitioningSystem::SetContentName(KPartition *partition, char *name,
 									KDiskDeviceJob *job)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!partition || !job || !name)
+		return B_BAD_VALUE;
+	if (!fModule->set_content_name)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (partition != _partition)
+			return B_ERROR;
+		status_t result = partition->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->set_content_name(fd, partition->ID(), name, job->ID());
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // SetType
@@ -596,8 +695,32 @@ status_t
 KPartitioningSystem::SetType(KPartition *partition, char *type,
 							 KDiskDeviceJob *job)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!partition || !job || !type)
+		return B_BAD_VALUE;
+	if (!fModule->set_type)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (partition != _partition)
+			return B_ERROR;
+		status_t result = partition->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->set_type(fd, partition->ID(), type, job->ID());
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // SetParameters
@@ -605,8 +728,32 @@ status_t
 KPartitioningSystem::SetParameters(KPartition *partition,
 								   const char *parameters, KDiskDeviceJob *job)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!partition || !job || !parameters)
+		return B_BAD_VALUE;
+	if (!fModule->set_parameters)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (partition != _partition)
+			return B_ERROR;
+		status_t result = partition->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->set_parameters(fd, partition->ID(), parameters, job->ID());
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // SetContentParameters
@@ -615,8 +762,32 @@ KPartitioningSystem::SetContentParameters(KPartition *partition,
 										  const char *parameters,
 										  KDiskDeviceJob *job)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!partition || !job || !parameters)
+		return B_BAD_VALUE;
+	if (!fModule->set_content_parameters)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (partition != _partition)
+			return B_ERROR;
+		status_t result = partition->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->set_content_parameters(fd, partition->ID(), parameters, job->ID());
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // Initialize
@@ -624,8 +795,32 @@ status_t
 KPartitioningSystem::Initialize(KPartition *partition, const char *name,
 								const char *parameters, KDiskDeviceJob *job)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!partition || !job || !name /*|| !parameters*/)
+		return B_BAD_VALUE;
+	if (!fModule->initialize)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (partition != _partition)
+			return B_ERROR;
+		status_t result = partition->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->initialize(fd, partition->ID(), name, parameters, job->ID());
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // CreateChild
@@ -635,8 +830,37 @@ KPartitioningSystem::CreateChild(KPartition *partition, off_t offset,
 								 const char *parameters, KDiskDeviceJob *job,
 								 KPartition **child, partition_id childID)
 {
-	// to be implemented
-	return B_ERROR;
+	// check parameters
+	if (!partition || !job || !type /*|| !parameters*/ || !child)
+		return B_BAD_VALUE;
+	if (!fModule->create_child)
+		return B_ENTRY_NOT_FOUND;
+	// lock partition and open partition device
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *_partition = manager->WriteLockPartition(partition->ID());
+	if (!_partition)
+		return B_ERROR;
+	int fd = -1;
+	{
+		PartitionRegistrar registrar(_partition, true);
+		PartitionRegistrar deviceRegistrar(_partition->Device(), true);
+		DeviceWriteLocker locker(_partition->Device(), true);
+		if (partition != _partition)
+			return B_ERROR;
+		status_t result = partition->Open(O_RDWR, &fd);
+		if (result != B_OK)
+			return result;
+	}
+	// let the module do its job
+	status_t result = fModule->create_child(fd, partition->ID(), offset, size,
+														type, parameters, job->ID(), &childID);
+
+	// find and return the child
+	*child = manager->FindPartition(childID, false);
+
+	// cleanup and return
+	close(fd);
+	return result;
 }
 
 // DeleteChild
diff --git a/src/system/kernel/disk_device_manager/ddm_userland_interface.cpp b/src/system/kernel/disk_device_manager/ddm_userland_interface.cpp
index 743e6ecdcd..8f04e61b68 100644
--- a/src/system/kernel/disk_device_manager/ddm_userland_interface.cpp
+++ b/src/system/kernel/disk_device_manager/ddm_userland_interface.cpp
@@ -1,4 +1,7 @@
-// ddm_userland_interface.cpp
+/** 	\file ddm_userland_interface.cpp
+ *
+ * 	\brief Interface for userspace calls.
+ */
 
 #include <stdlib.h>
 
@@ -721,7 +724,7 @@ _user_supports_initializing_partition(partition_id partitionID,
 									  int32 changeCounter,
 									  const char *_diskSystemName)
 {
-	if (_diskSystemName)
+	if (!_diskSystemName)
 		return false;
 	char diskSystemName[B_DISK_SYSTEM_NAME_LENGTH];
 	status_t error = ddm_strlcpy(diskSystemName, _diskSystemName, B_DISK_SYSTEM_NAME_LENGTH);
@@ -969,10 +972,10 @@ _user_validate_initialize_partition(partition_id partitionID,
 		error = validate_initialize_partition(partition, changeCounter,
 											  diskSystemName, name, parameters);
 	}
-	if (!error)
-		error = ddm_strlcpy(_name, name, B_DISK_DEVICE_NAME_LENGTH);
+	if (!error) 
+		error = ddm_strlcpy(name, _name, B_DISK_DEVICE_NAME_LENGTH);
 	free(parameters);
-	return error;											  
+	return error;
 }
 
 // _user_validate_create_child_partition
@@ -1548,6 +1551,7 @@ _user_initialize_partition(partition_id partitionID, int32 changeCounter,
 			}
 			if (!error) {
 				partition->Changed(B_PARTITION_CHANGED_CONTENT_PARAMETERS);
+				partition->Changed(B_PARTITION_CHANGED_INITIALIZATION);
 				// implicit content disk system changes
 				error = partition->DiskSystem()->ShadowPartitionChanged(
 					partition, B_PARTITION_INITIALIZE);
diff --git a/src/system/kernel/disk_device_manager/jobs/KCreateChildJob.cpp b/src/system/kernel/disk_device_manager/jobs/KCreateChildJob.cpp
index 72c41fd938..a53af21c4d 100644
--- a/src/system/kernel/disk_device_manager/jobs/KCreateChildJob.cpp
+++ b/src/system/kernel/disk_device_manager/jobs/KCreateChildJob.cpp
@@ -1,3 +1,114 @@
 // KCreateChildJob.cpp
 
 #include "KCreateChildJob.h"
+
+
+#include <KernelExport.h>
+#include <DiskDeviceDefs.h>
+#include <KDiskDevice.h>
+#include <KDiskDeviceManager.h>
+#include <KDiskDeviceUtils.h>
+#include <KDiskSystem.h>
+#include <KPartition.h>
+#include <KPartitionVisitor.h>
+#include <string.h>
+
+#include "ddm_operation_validation.h"
+
+
+
+KCreateChildJob::KCreateChildJob(partition_id partition, partition_id child, off_t offset,
+				off_t size, const char *type, const char *parameters) 
+	: KDiskDeviceJob( B_DISK_DEVICE_JOB_CREATE, partition, partition ),
+	fChildID( child ), fOffset( offset ), fSize( size ),
+	fType ( !type ? NULL : strcpy ( new char[strlen(type)+1], type ) ),
+	fParameters( !parameters ? NULL : strcpy( new char[strlen(parameters)+1], parameters ) )		
+{
+	SetDescription( "creating child of the partition" );
+}
+				
+KCreateChildJob::~KCreateChildJob() {}
+
+/**
+ * Do the actual creation
+ * 
+ * \note in time of calling the \c KDiskSystem function for creating child, the partition is NOT locked 
+ */
+status_t KCreateChildJob::Do() {
+	KDiskDeviceManager * manager = KDiskDeviceManager::Default();
+	
+	KPartition * partition = manager->WriteLockPartition( PartitionID() );
+	
+	if( partition ) {
+		PartitionRegistrar registrar(partition, true);
+		PartitionRegistrar deviceRegistrar(partition->Device(), true);
+				
+		DeviceWriteLocker locker(partition->Device(), true);
+		
+		
+		if (!partition->DiskSystem()) {
+			SetErrorMessage("Partition has no disk system!");
+			return B_BAD_VALUE;
+		}
+		
+		
+		
+		// all descendants should be marked busy/descendant busy
+		if ( isPartitionNotBusy( partition ) ) {
+			SetErrorMessage("Can't create child of non-busy partition!");
+			return B_ERROR;
+		}
+		
+		
+		KPartition * childPartition = manager->WriteLockPartition( fChildID );
+		if( !childPartition ) {
+			//TODO
+		}
+				
+		
+		off_t newOffset = fOffset;
+		off_t newSize = fSize;
+		
+				
+		status_t validation_result = validate_create_child_partition (
+				partition, partition->ChangeCounter(),
+				&newOffset, &fSize, fType,
+				fParameters, NULL, false
+			);
+				
+		if( validation_result != B_OK ) {
+			SetErrorMessage( "Validating of creating new child failed!" );
+			return validation_result;
+		}
+		
+		if( newOffset != fOffset ) {
+			SetErrorMessage( "Requested offset is not valid." );
+			return B_ERROR;
+		}
+		
+		if( newSize != fSize ) {
+			SetErrorMessage( "Requested size is not valid" );
+		}
+				
+		KDiskSystem *diskSystem = partition->DiskSystem();
+		DiskSystemLoader loader(diskSystem);
+		KPartition * newChild = 0;
+		
+		locker.Unlock(); 
+		
+		status_t create_result = diskSystem->CreateChild(
+				partition, newOffset, newSize, fType,
+				fParameters, this, &newChild, fChildID );
+		 
+		if( create_result != B_OK ) {
+			SetErrorMessage( "Creating new partition child failed!" );
+			return create_result;
+		}
+		
+		return B_OK;
+	}
+	else {
+		SetErrorMessage( "Couldn't find partition." );
+		return B_ENTRY_NOT_FOUND;
+	}
+}
diff --git a/src/system/kernel/disk_device_manager/jobs/KCreateChildJob.h b/src/system/kernel/disk_device_manager/jobs/KCreateChildJob.h
index d0a631b324..629d1d073c 100644
--- a/src/system/kernel/disk_device_manager/jobs/KCreateChildJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KCreateChildJob.h
@@ -8,13 +8,32 @@
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * Create new child of given partition
+ */
 class KCreateChildJob : public KDiskDeviceJob {
 public:
+	/**
+	 * Creates the job.
+	 * 
+	 * \param partition whose children should we create
+ 	 * \param child new child ID
+	 * \param offset where the child should start
+	 * \param size size of the new child
+	 * \param parameters additional parameters for the operation
+	 */
 	KCreateChildJob(partition_id partition, partition_id child, off_t offset,
-					off_t size, const char *parameters);
+					off_t size, const char *type, const char *parameters);
 	virtual ~KCreateChildJob();
 
 	virtual status_t Do();
+	
+private:
+	partition_id fChildID;
+	off_t fOffset, fSize;
+	char * fType;
+	char * fParameters;
+	
 };
 
 } // namespace DiskDevice
diff --git a/src/system/kernel/disk_device_manager/jobs/KDefragmentJob.cpp b/src/system/kernel/disk_device_manager/jobs/KDefragmentJob.cpp
index 58fa11aff3..2c88448ba6 100644
--- a/src/system/kernel/disk_device_manager/jobs/KDefragmentJob.cpp
+++ b/src/system/kernel/disk_device_manager/jobs/KDefragmentJob.cpp
@@ -1,3 +1,92 @@
 // KDefragmentJob.cpp
 
 #include "KDefragmentJob.h"
+
+
+#include <KernelExport.h>
+#include <DiskDeviceDefs.h>
+#include <KDiskDevice.h>
+#include <KDiskDeviceManager.h>
+#include <KDiskDeviceUtils.h>
+#include <KDiskSystem.h>
+#include <KPartition.h>
+#include <KPartitionVisitor.h>
+#include <string.h>
+
+#include "ddm_operation_validation.h"
+
+
+KDefragmentJob::KDefragmentJob(partition_id partition)
+	: KDiskDeviceJob( B_DISK_DEVICE_JOB_DEFRAGMENT, partition, partition )	
+{
+	SetDescription( "defragmenting partition" );
+}
+
+
+KDefragmentJob::~KDefragmentJob() {}
+
+status_t KDefragmentJob::Do(){
+	
+	KDiskDeviceManager * manager = KDiskDeviceManager::Default();
+	
+	KPartition * partition = manager->WriteLockPartition( PartitionID() );
+	
+	if( partition ) {
+		PartitionRegistrar registrar(partition, true);
+		PartitionRegistrar deviceRegistrar(partition->Device(), true);
+				
+		DeviceWriteLocker locker(partition->Device(), true);
+		
+		//some basic checks
+		
+		if (!partition->DiskSystem()) {
+			SetErrorMessage("Partition has no disk system!");
+			return B_BAD_VALUE;
+		}
+			
+		
+		// all descendants should be marked busy/descendant busy
+		if ( isPartitionNotBusy( partition ) ) {
+			SetErrorMessage("Can't defragment non-busy partition!");
+			return B_ERROR;
+		}
+		
+		bool whileMounted;
+		//OK, seems alright, let's validate the job
+		status_t validation_result = validate_defragment_partition(
+				partition, partition->ChangeCounter(),
+				&whileMounted, false);
+		
+		if( validation_result != B_OK ) {
+			SetErrorMessage( "Validation of defragmenting partition failed.");
+			return validation_result;
+		}
+		
+		if( !whileMounted && partition->IsMounted() ) {
+			SetErrorMessage( "This partition cannot be defragmented while mounted." );
+			return B_ERROR;
+		}
+				
+		//everything OK, let's do the job!
+		
+		KDiskSystem *diskSystem = partition->DiskSystem();
+		DiskSystemLoader loader(diskSystem);
+		
+		locker.Unlock();
+		
+		status_t defrag_result = diskSystem->Defragment( partition, this );
+		
+		if( defrag_result != B_OK ) {
+			SetErrorMessage( "Defragmenting partition failed!" );
+			return defrag_result;
+		}
+		
+		return B_OK;
+		
+		
+	} else {
+		SetErrorMessage( "Couldn't find partition!" );
+		return B_ENTRY_NOT_FOUND;
+	}
+	
+}
diff --git a/src/system/kernel/disk_device_manager/jobs/KDefragmentJob.h b/src/system/kernel/disk_device_manager/jobs/KDefragmentJob.h
index 28e3982308..d3f3230ccd 100644
--- a/src/system/kernel/disk_device_manager/jobs/KDefragmentJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KDefragmentJob.h
@@ -8,8 +8,17 @@
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * Defragments the device
+ */
 class KDefragmentJob : public KDiskDeviceJob {
 public:
+	/**
+	 * Creates the job
+	 * 
+	 * \param partition which device should we defragment
+	 */
+	
 	KDefragmentJob(partition_id partition);
 	virtual ~KDefragmentJob();
 
diff --git a/src/system/kernel/disk_device_manager/jobs/KDeleteChildJob.cpp b/src/system/kernel/disk_device_manager/jobs/KDeleteChildJob.cpp
index 5eb856a830..db471ffe59 100644
--- a/src/system/kernel/disk_device_manager/jobs/KDeleteChildJob.cpp
+++ b/src/system/kernel/disk_device_manager/jobs/KDeleteChildJob.cpp
@@ -1,3 +1,80 @@
 // KDeleteChildJob.cpp
 
 #include "KDeleteChildJob.h"
+
+
+
+#include <KernelExport.h>
+#include <DiskDeviceDefs.h>
+#include <KDiskDevice.h>
+#include <KDiskDeviceManager.h>
+#include <KDiskDeviceUtils.h>
+#include <KDiskSystem.h>
+#include <KPartition.h>
+#include <KPartitionVisitor.h>
+#include <string.h>
+
+#include "ddm_operation_validation.h"
+
+
+
+KDeleteChildJob::KDeleteChildJob(partition_id parent, partition_id partition)
+	: KDiskDeviceJob( B_DISK_DEVICE_JOB_DELETE, partition, parent )
+{
+	SetDescription( "deleting child of the partition" );
+}
+		
+KDeleteChildJob::~KDeleteChildJob() {}
+
+status_t KDeleteChildJob::Do(){
+	KDiskDeviceManager * manager = KDiskDeviceManager::Default();
+	
+	KPartition * partition = manager->WriteLockPartition( PartitionID() );
+	
+	if( partition ) {
+		PartitionRegistrar registrar(partition, true);
+		PartitionRegistrar deviceRegistrar(partition->Device(), true);
+				
+		DeviceWriteLocker locker(partition->Device(), true);
+		
+		
+		if (!partition->ParentDiskSystem()) {
+			SetErrorMessage("Partition has no parent disk system!");
+			return B_BAD_VALUE;
+		}
+				
+		// all descendants should be marked busy/descendant busy
+		if ( isPartitionNotBusy( partition ) ) {
+			SetErrorMessage("Can't delete child of non-busy partition!");
+			return B_ERROR;
+		}
+		
+		status_t validation_result = validate_delete_child_partition(
+				partition, partition->ChangeCounter(),
+				false);
+		
+		if( validation_result != B_OK ) {
+			SetErrorMessage( "Validation of deleting child failed!" );
+			return validation_result;
+		}
+		
+		//everything OK, let's do the job!
+		KDiskSystem *parentDiskSystem = partition->ParentDiskSystem();
+		DiskSystemLoader loader(parentDiskSystem );
+		
+		locker.Unlock();
+		
+		status_t delete_result = parentDiskSystem->DeleteChild( partition, this );
+		
+		if( delete_result != B_OK ) {
+			SetErrorMessage( "Deleting child failed!" );
+			return delete_result;
+		}
+		
+		return B_OK;
+		
+	} else {
+		SetErrorMessage( "Couldn't find partition!" );
+		return B_ENTRY_NOT_FOUND;
+	}
+}
diff --git a/src/system/kernel/disk_device_manager/jobs/KDeleteChildJob.h b/src/system/kernel/disk_device_manager/jobs/KDeleteChildJob.h
index fec4cd5a1a..67955dd26e 100644
--- a/src/system/kernel/disk_device_manager/jobs/KDeleteChildJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KDeleteChildJob.h
@@ -8,8 +8,17 @@
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * Deletes specific child of a partition/device
+ */
 class KDeleteChildJob : public KDiskDeviceJob {
 public:
+	/**
+	 * Creates the job
+	 * 
+	 * \param parent device of the deleted partition
+	 * \param partition partition supposed to be removed
+	 */
 	KDeleteChildJob(partition_id parent, partition_id partition);
 	virtual ~KDeleteChildJob();
 
diff --git a/src/system/kernel/disk_device_manager/jobs/KInitializeJob.cpp b/src/system/kernel/disk_device_manager/jobs/KInitializeJob.cpp
index ededba4573..a090dad555 100644
--- a/src/system/kernel/disk_device_manager/jobs/KInitializeJob.cpp
+++ b/src/system/kernel/disk_device_manager/jobs/KInitializeJob.cpp
@@ -1,3 +1,105 @@
 // KInitializeJob.cpp
 
+#include <stdio.h>
+
+#include <KernelExport.h>
+#include <DiskDeviceDefs.h>
+#include <KDiskDevice.h>
+#include <KDiskDeviceManager.h>
+#include <KDiskDeviceUtils.h>
+#include <KDiskSystem.h>
+#include <KPartition.h>
+#include <KPartitionVisitor.h>
+#include <string.h>
+
+#include "ddm_operation_validation.h"
 #include "KInitializeJob.h"
+
+// debugging
+//#define DBG(x)
+#define DBG(x) x
+#define OUT dprintf
+
+
+KInitializeJob::KInitializeJob(partition_id partition, disk_system_id diskSystemID,
+				const char *name, const char *parameters)
+	: KDiskDeviceJob( B_DISK_DEVICE_JOB_INITIALIZE, partition, partition ), 
+	  fDiskSystemID( diskSystemID ),
+	  fName( !name ? NULL : strcpy( new char[strlen(name)+1], name ) ),
+	  fParameters( !parameters ? NULL : strcpy( new char[strlen(parameters)+1], parameters ) )
+{
+	SetDescription( "initializing the partition with given disk system" );
+}
+
+KInitializeJob::~KInitializeJob() {
+	delete[] fParameters;
+}
+
+status_t KInitializeJob::Do() {
+DBG(OUT("KInitializeJob::Do(%ld)\n", PartitionID()));
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *partition = manager->WriteLockPartition(PartitionID());
+	if (partition) {
+		PartitionRegistrar registrar(partition, true);
+		PartitionRegistrar deviceRegistrar(partition->Device(), true);
+		
+		DeviceWriteLocker locker(partition->Device(), true);
+		// basic checks
+		
+// 		if (!partition->ParentDiskSystem()) {
+// 			SetErrorMessage("Partition has no parent disk system!");
+// 			return B_BAD_VALUE;
+// 		}
+		
+		// all descendants should be marked busy/descendant busy
+		if ( isPartitionNotBusy( partition ) ) {
+			SetErrorMessage("Can't initialize non-busy partition!");
+			return B_ERROR;
+		}
+		
+/*		if( !fParameters ) {
+			//no parameters for the operation
+			SetErrorMessage( "No parameters for partition initialization." );
+			return B_ERROR;
+		}*/
+		
+		
+		//TODO shouldn't we load the disk system AFTER the validation?
+		KDiskSystem *diskSystemToInit = manager->LoadDiskSystem( fDiskSystemID );
+		if( ! diskSystemToInit ) {
+			SetErrorMessage( "Given DiskSystemID doesn't correspond to any known DiskSystem.");
+			return B_BAD_VALUE;
+		}
+		DiskSystemLoader loader2(diskSystemToInit);
+		
+		status_t validation_result = validate_initialize_partition(
+				partition, partition->ChangeCounter(),
+				diskSystemToInit->Name(), fName,
+				fParameters, false );
+		
+		if( validation_result != B_OK ) {
+			SetErrorMessage( "Validation of initializing partition failed!" );
+			return validation_result;
+		}
+		
+		//everything seems OK -> let's do the job
+		locker.Unlock();
+		
+		status_t init_result = diskSystemToInit->Initialize( partition, fName, fParameters, this );
+		
+		if( init_result != B_OK ) {
+			SetErrorMessage( "Initialization of partition failed!" );
+			return init_result;
+		}
+		
+		partition->SetDiskSystem(diskSystemToInit);
+		
+		return B_OK;
+		
+		
+	} else {
+		SetErrorMessage( "Couldn't find partition." );
+		return B_ENTRY_NOT_FOUND;
+	}
+	
+}
diff --git a/src/system/kernel/disk_device_manager/jobs/KInitializeJob.h b/src/system/kernel/disk_device_manager/jobs/KInitializeJob.h
index 055cd75243..f66b498a43 100644
--- a/src/system/kernel/disk_device_manager/jobs/KInitializeJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KInitializeJob.h
@@ -8,13 +8,29 @@
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * Initializes the device with given disk system (i.e. partitioning or file system)
+ */
 class KInitializeJob : public KDiskDeviceJob {
 public:
+	/**
+	 * Creates the job.
+	 * 
+	 * \param partition the partition to initialize
+	 * \param diskSystemID which disk system the partition should be initialized with
+	 * \param parameters additional parameters for the operation
+	 */
 	KInitializeJob(partition_id partition, disk_system_id diskSystemID,
-				   const char *parameters);
+				   const char *name, const char *parameters);
 	virtual ~KInitializeJob();
 
 	virtual status_t Do();
+	
+private:
+	disk_system_id fDiskSystemID;
+	char * fName;
+	char * fParameters;
+		
 };
 
 } // namespace DiskDevice
diff --git a/src/system/kernel/disk_device_manager/jobs/KMoveJob.cpp b/src/system/kernel/disk_device_manager/jobs/KMoveJob.cpp
index 948aa5d40e..85953ecca6 100644
--- a/src/system/kernel/disk_device_manager/jobs/KMoveJob.cpp
+++ b/src/system/kernel/disk_device_manager/jobs/KMoveJob.cpp
@@ -1,3 +1,98 @@
 // KMoveJob.cpp
-
 #include "KMoveJob.h"
+
+#include <stdio.h>
+
+#include <KernelExport.h>
+#include <DiskDeviceDefs.h>
+#include <KDiskDevice.h>
+#include <KDiskDeviceManager.h>
+#include <KDiskDeviceUtils.h>
+#include <KDiskSystem.h>
+#include <KPartition.h>
+#include <KPartitionVisitor.h>
+
+#include "ddm_operation_validation.h"
+
+
+
+// debugging
+//#define DBG(x)
+#define DBG(x) x
+#define OUT dprintf
+
+KMoveJob::KMoveJob(partition_id parentID, partition_id partitionID, off_t offset)
+	: KDiskDeviceJob(B_DISK_DEVICE_JOB_MOVE, partitionID, parentID ),
+	fNewOffset(offset)
+{
+	SetDescription( "moving partition" );	
+}
+
+KMoveJob::~KMoveJob() {}
+
+
+status_t KMoveJob::Do() {
+	
+	DBG(OUT( "KMoveJob::Do(%ld)\n", PartitionID() ));
+	
+	//get the partition
+	KDiskDeviceManager * manager = KDiskDeviceManager::Default();
+	KPartition *partition = manager->WriteLockPartition(PartitionID());
+	if (partition) {
+		//OK, we have the partition, do some checks
+		PartitionRegistrar registrar(partition, true);
+		PartitionRegistrar deviceRegistrar(partition->Device(), true);
+		
+		DeviceWriteLocker locker(partition->Device(), true);
+		
+		// basic checks
+		if (!partition->ParentDiskSystem()) {
+			SetErrorMessage("Partition has no parent disk system!");
+			return B_BAD_VALUE;
+		}
+		
+		if(partition->Offset() == fNewOffset ) {
+			//we are already on the right place -> nothing to do...
+			return B_OK;
+		}
+		
+		off_t new_offset = fNewOffset;
+		
+		status_t validate_result = validate_move_partition(partition, partition->ChangeCounter(),
+				&new_offset, true, false ); //TODO posledni 2 parametry????
+		if( validate_result != B_OK ) {
+			SetErrorMessage( "Validation of the new partition offset failed." );
+			return validate_result;
+		}
+		
+		if( new_offset != fNewOffset ) {
+			SetErrorMessage( "Requested partition offset not valid." );
+			return B_ERROR;
+		}
+		
+		// all descendants should be marked busy/descendant busy
+		if ( isPartitionNotBusy( partition ) ) {
+			SetErrorMessage("Can't move non-busy partition!");
+			return B_ERROR;
+		}
+		
+		//get all necessary objects
+		KDiskSystem *parentDiskSystem = partition->ParentDiskSystem();
+		KDiskSystem *childDiskSystem = partition->DiskSystem();
+				
+		
+		locker.Unlock();
+		
+		status_t move_result = parentDiskSystem->Move( partition, fNewOffset, this );
+		if( move_result != B_OK ) {
+			SetErrorMessage( "Moving of partition failed." );
+		}
+		return move_result;
+	//do the move
+		
+	} else {
+		SetErrorMessage("Couldn't find partition.");
+		return B_ENTRY_NOT_FOUND;
+	}
+	return B_ERROR;
+}
diff --git a/src/system/kernel/disk_device_manager/jobs/KMoveJob.h b/src/system/kernel/disk_device_manager/jobs/KMoveJob.h
index de96c9ff02..f525d34c58 100644
--- a/src/system/kernel/disk_device_manager/jobs/KMoveJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KMoveJob.h
@@ -3,17 +3,31 @@
 #ifndef _K_DISK_DEVICE_MOVE_JOB_H
 #define _K_DISK_DEVICE_MOVE_JOB_H
 
-#include "KDiskDeviceJob.h"
+#include "KDiskDeviceJob.h" 
 
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * Moves given child of a partition/device
+ */
 class KMoveJob : public KDiskDeviceJob {
 public:
-	KMoveJob(partition_id parent, partition_id partition, off_t offset);
+	/**
+	 * Creates the job.
+	 * 
+	 * \param parentID the device whose child should be moved
+	 * \param partitionID the child to move
+	 * \param offset where to move
+	 */
+	KMoveJob(partition_id parentID, partition_id partitionID, off_t offset);
 	virtual ~KMoveJob();
 
 	virtual status_t Do();
+	
+	
+private:
+	off_t fNewOffset;
 };
 
 } // namespace DiskDevice
diff --git a/src/system/kernel/disk_device_manager/jobs/KRepairJob.cpp b/src/system/kernel/disk_device_manager/jobs/KRepairJob.cpp
index 9261a41e58..0a6ad415f0 100644
--- a/src/system/kernel/disk_device_manager/jobs/KRepairJob.cpp
+++ b/src/system/kernel/disk_device_manager/jobs/KRepairJob.cpp
@@ -1,3 +1,95 @@
 // KRepairJob.cpp
 
 #include "KRepairJob.h"
+
+
+#include <KernelExport.h>
+#include <DiskDeviceDefs.h>
+#include <KDiskDevice.h>
+#include <KDiskDeviceManager.h>
+#include <KDiskDeviceUtils.h>
+#include <KDiskSystem.h>
+#include <KPartition.h>
+#include <KPartitionVisitor.h>
+#include <string.h>
+
+#include "ddm_operation_validation.h"
+
+
+
+
+
+
+KRepairJob::KRepairJob(partition_id partition, bool checkOnly)
+	: KDiskDeviceJob( B_DISK_DEVICE_JOB_REPAIR, partition, partition ),
+	fCheckOnly( checkOnly )
+{
+	SetDescription( "repairing partition" );
+}
+KRepairJob::~KRepairJob() {}
+
+status_t KRepairJob::Do(){
+	
+	KDiskDeviceManager * manager = KDiskDeviceManager::Default();
+	
+	KPartition * partition = manager->WriteLockPartition( PartitionID() );
+	
+	if( partition ) {
+		PartitionRegistrar registrar(partition, true);
+		PartitionRegistrar deviceRegistrar(partition->Device(), true);
+		
+		DeviceWriteLocker locker(partition->Device(), true);
+		
+		//basic checks
+		if( !partition->DiskSystem() ) {
+			SetErrorMessage( "Partition has no disk system." );
+			return B_BAD_VALUE;
+		}
+		
+		if ( isPartitionNotBusy( partition ) ) {
+			SetErrorMessage("Can't repair non-busy partition!");
+			return B_ERROR;
+		}
+		
+		bool whileMounted;
+		
+		status_t validation_result = validate_repair_partition(
+				partition, partition->ChangeCounter(),
+				fCheckOnly, &whileMounted,
+				false);
+		
+		if( validation_result != B_OK ) {
+			SetErrorMessage( "Validation repairing partition failed!" );
+			return validation_result;
+		}
+		
+		//everything OK, let's do the job
+		KDiskSystem * diskSystem = partition->DiskSystem();
+		DiskSystemLoader loader(diskSystem); 
+		
+		locker.Unlock();
+				
+		status_t repair_result = diskSystem->Repair( partition, fCheckOnly, this );
+		
+		if( repair_result != B_OK ) {
+			if( fCheckOnly ) {
+				SetErrorMessage( "Checking for repairing partition failed!" );
+			} else {
+				SetErrorMessage( "Repairing partition failed!" );				
+			}
+			return repair_result;
+		}
+		
+		return B_OK;
+		
+	}else {
+		SetErrorMessage( "Couldn't find partition!" );
+		return B_ENTRY_NOT_FOUND;
+	}
+	
+	
+	
+	
+	
+	
+}
diff --git a/src/system/kernel/disk_device_manager/jobs/KRepairJob.h b/src/system/kernel/disk_device_manager/jobs/KRepairJob.h
index a666bed994..421d9cd0d1 100644
--- a/src/system/kernel/disk_device_manager/jobs/KRepairJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KRepairJob.h
@@ -8,12 +8,25 @@
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * Repair partition (or check for repairs)
+ */
 class KRepairJob : public KDiskDeviceJob {
 public:
-	KRepairJob(partition_id partition);
+	/**
+	 * Creates the job.
+	 * 
+	 * \param partition the partition which should be repared
+	 * \param checkOnly when true, the partition is only checked, but no actual
+	 * 		repairs are proceeded
+	 */
+	KRepairJob(partition_id partition, bool checkOnly);
 	virtual ~KRepairJob();
 
 	virtual status_t Do();
+	
+private:
+	bool fCheckOnly;
 };
 
 } // namespace DiskDevice
diff --git a/src/system/kernel/disk_device_manager/jobs/KResizeJob.h b/src/system/kernel/disk_device_manager/jobs/KResizeJob.h
index bdad327392..606be1d7c9 100644
--- a/src/system/kernel/disk_device_manager/jobs/KResizeJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KResizeJob.h
@@ -8,8 +8,18 @@
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * Resizes a partition.
+ */
 class KResizeJob : public KDiskDeviceJob {
 public:
+	/**
+	 * Creates the job.
+	 * 
+	 * \param parentID the device whose child should be resized
+	 * \param partitionID the partition which should be resized
+	 * \param size new size for the partition 
+	 */
 	KResizeJob(partition_id parentID, partition_id partitionID, off_t size);
 	virtual ~KResizeJob();
 
diff --git a/src/system/kernel/disk_device_manager/jobs/KScanPartitionJob.cpp b/src/system/kernel/disk_device_manager/jobs/KScanPartitionJob.cpp
index 443e737814..383fc83f18 100644
--- a/src/system/kernel/disk_device_manager/jobs/KScanPartitionJob.cpp
+++ b/src/system/kernel/disk_device_manager/jobs/KScanPartitionJob.cpp
@@ -33,6 +33,12 @@ KScanPartitionJob::~KScanPartitionJob()
 status_t
 KScanPartitionJob::Do()
 {
+/*#ifdef _BOOT_MODE
+	OUT( "\nScanJob boot mode\n\n" );
+#else 
+	OUT( "\nScanJob NOT boot mode\n\n" );
+#endif*/
+	
 	// get the partition
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	KPartition *partition = manager->WriteLockPartition(PartitionID());
diff --git a/src/system/kernel/disk_device_manager/jobs/KScanPartitionJob.h b/src/system/kernel/disk_device_manager/jobs/KScanPartitionJob.h
index 8a8db88804..a33b48261f 100644
--- a/src/system/kernel/disk_device_manager/jobs/KScanPartitionJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KScanPartitionJob.h
@@ -10,14 +10,25 @@ namespace DiskDevice {
 
 class KPartition;
 
+/**
+ * Scans partition and tries to find the most suitable disk system for it
+ */
 class KScanPartitionJob : public KDiskDeviceJob {
 public:
+	/**
+	 * Creates the job.
+	 * 
+	 * \param partitionID the partition to scan
+	 */
 	KScanPartitionJob(partition_id partitionID);
 	virtual ~KScanPartitionJob();
 
 	virtual status_t Do();
 
 private:
+	/**
+	 * Do the actual scan.
+	 */
 	status_t _ScanPartition(KPartition *partition);
 };
 
diff --git a/src/system/kernel/disk_device_manager/jobs/KSetParametersJob.cpp b/src/system/kernel/disk_device_manager/jobs/KSetParametersJob.cpp
index 2e40a4beca..e46d172c4b 100644
--- a/src/system/kernel/disk_device_manager/jobs/KSetParametersJob.cpp
+++ b/src/system/kernel/disk_device_manager/jobs/KSetParametersJob.cpp
@@ -1,3 +1,129 @@
 // KSetParametersJob.cpp
 
+
+
+#include <KernelExport.h>
+#include <DiskDeviceDefs.h>
+#include <KDiskDevice.h>
+#include <KDiskDeviceManager.h>
+#include <KDiskDeviceUtils.h>
+#include <KDiskSystem.h>
+#include <KPartition.h>
+#include <KPartitionVisitor.h>
+
+#include <string.h>
+
+
 #include "KSetParametersJob.h"
+#include "ddm_operation_validation.h"
+
+
+
+KSetParametersJob::KSetParametersJob(partition_id parent, partition_id partition,
+				  const char *parameters, const char *contentParameters)
+	: KDiskDeviceJob(B_DISK_DEVICE_JOB_SET_TYPE, partition, parent), 
+	fParams( !parameters ? NULL : strcpy( new char[strlen(parameters)+1], parameters )),
+	fContentParams( 
+			!contentParameters ? NULL : 
+			strcpy( new char[strlen(contentParameters)+1], contentParameters))
+{
+	SetDescription( "setting partition parameters&content parameters" );
+}
+				  
+				  
+KSetParametersJob::~KSetParametersJob(){}
+
+status_t KSetParametersJob::Do(){
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	KPartition *partition = manager->WriteLockPartition(PartitionID());
+	if (partition) {
+		if( !fParams && !fContentParams ) {	
+			SetErrorMessage( "No parameter to set." );		
+			return B_BAD_VALUE;
+		}
+		PartitionRegistrar registrar(partition, true);
+		PartitionRegistrar deviceRegistrar(partition->Device(), true);
+		
+		//TODO is lock necessary?
+		DeviceWriteLocker locker(partition->Device(), true);
+		
+		
+		
+		
+		// all descendants should be marked busy/descendant busy
+		if ( isPartitionNotBusy( partition ) ) {
+			SetErrorMessage("Can't set parameters for non-busy partition!");
+			return B_ERROR;
+		}
+		
+		//TODO unlock?
+		
+		if( fParams ) {
+			// basic checks
+			
+			if (!partition->ParentDiskSystem()) {
+				SetErrorMessage("Partition has no parent disk system!");
+				return B_BAD_VALUE;
+			}
+					
+			//TODO mayebe give copy of parameters?
+			//we have some parameters to set
+			status_t validation_result = validate_set_partition_parameters( partition, partition->ChangeCounter(), fParams, false );
+			
+			KDiskSystem *parentDiskSystem = partition->ParentDiskSystem();
+			DiskSystemLoader loader(parentDiskSystem);
+			
+			if( validation_result != B_OK ) {
+				SetErrorMessage( "Validation of setting partition parameters failed." );
+				return validation_result;
+			}
+			
+			locker.Unlock();
+			status_t set_pars_result = parentDiskSystem->SetParameters( partition, fParams, this );
+			
+			if( set_pars_result != B_OK ) {
+				SetErrorMessage( "Setting partition parameters failed." );
+			}			
+		}
+		
+		
+		if( fContentParams ) {
+			// basic checks
+			
+			if (!partition->DiskSystem()) {
+				SetErrorMessage("Partition has no disk system!");
+				return B_BAD_VALUE;
+			}
+		
+			
+			
+			status_t validation_result = validate_set_partition_content_parameters (
+					partition, partition->ChangeCounter(), fContentParams, false );
+			
+			if( validation_result != B_OK ) {
+				SetErrorMessage( "Validation of setting partition content parameters failed." );
+				return validation_result;
+			}
+			
+			KDiskSystem *diskSystem = partition->DiskSystem();
+			DiskSystemLoader loader(diskSystem);
+			
+			locker.Unlock();
+			status_t set_cont_pars_result = diskSystem->SetContentParameters( 
+					partition, fContentParams, this );
+			
+			if( set_cont_pars_result != B_OK ) {
+				SetErrorMessage( "Setting partition content parameters failed." );
+			}
+		}
+		
+			
+		return B_OK;
+		
+		
+	} else {
+		SetErrorMessage( "Couldn't find partition" );
+		return B_ENTRY_NOT_FOUND;
+	}
+	
+}
diff --git a/src/system/kernel/disk_device_manager/jobs/KSetParametersJob.h b/src/system/kernel/disk_device_manager/jobs/KSetParametersJob.h
index 418dfc33cb..efcad338ea 100644
--- a/src/system/kernel/disk_device_manager/jobs/KSetParametersJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KSetParametersJob.h
@@ -3,18 +3,36 @@
 #ifndef _K_DISK_DEVICE_SET_PARAMETERS_JOB_H
 #define _K_DISK_DEVICE_SET_PARAMETERS_JOB_H
 
+#include "KDiskDeviceJob.h"
+
 namespace BPrivate {
 namespace DiskDevice {
 
-#include "KDiskDeviceJob.h"
 
+/**
+ * Sets the parameters for partition and/or for its content
+ * 
+ * - can set both partition parameters and parameters for its content - 
+ * 	but it's possible to create it with only one of these parameters
+ */
 class KSetParametersJob : public KDiskDeviceJob {
 public:
+	/**
+	 * Creates the job.
+	 * 
+	 * \param partition the partition whose params (or content params) should be set
+	 * \param parameters the new parameters for the partition
+	 * \param contentParameters the new parameters for partition's content
+	 */
 	KSetParametersJob(partition_id parent, partition_id partition,
 					  const char *parameters, const char *contentParameters);
 	virtual ~KSetParametersJob();
 
 	virtual status_t Do();
+	
+	
+private:
+		char * fParams, * fContentParams;
 };
 
 } // namespace DiskDevice
diff --git a/src/system/kernel/disk_device_manager/jobs/KUninitializeJob.h b/src/system/kernel/disk_device_manager/jobs/KUninitializeJob.h
index daf8077890..f77b51cd3d 100644
--- a/src/system/kernel/disk_device_manager/jobs/KUninitializeJob.h
+++ b/src/system/kernel/disk_device_manager/jobs/KUninitializeJob.h
@@ -8,8 +8,14 @@
 namespace BPrivate {
 namespace DiskDevice {
 
+/**
+ * Uninitializes the partition/device
+ */
 class KUninitializeJob : public KDiskDeviceJob {
 public:
+	/**
+	 * Creates the job
+	 */
 	KUninitializeJob(partition_id partitionID);
 	virtual ~KUninitializeJob();