diff --git a/headers/posix/sys/param.h b/headers/posix/sys/param.h
index a072674c7b..c5e5ea8b0e 100644
--- a/headers/posix/sys/param.h
+++ b/headers/posix/sys/param.h
@@ -14,6 +14,7 @@
 #define MAXPATHLEN      PATH_MAX
 #define MAXSYMLINKS		SYMLOOP_MAX
 #define NOFILE          OPEN_MAX
+#define DEV_BSIZE		512
 
 
 #ifndef MIN
diff --git a/headers/private/fs_shell/fssh_api_wrapper.h b/headers/private/fs_shell/fssh_api_wrapper.h
index 6b3925463d..65a62c22e8 100644
--- a/headers/private/fs_shell/fssh_api_wrapper.h
+++ b/headers/private/fs_shell/fssh_api_wrapper.h
@@ -154,6 +154,10 @@
 #define B_MIME_TYPE_LENGTH	FSSH_B_MIME_TYPE_LENGTH
 #define B_MAX_SYMLINKS		FSSH_B_MAX_SYMLINKS
 
+// Params
+
+#define DEV_BSIZE			FSSH_DEV_BSIZE
+
 // Open Modes
 #define B_READ_ONLY			FSSH_B_READ_ONLY
 #define B_WRITE_ONLY		FSSH_B_WRITE_ONLY
diff --git a/headers/private/fs_shell/fssh_defs.h b/headers/private/fs_shell/fssh_defs.h
index 5bba3e0af1..80ac5da782 100644
--- a/headers/private/fs_shell/fssh_defs.h
+++ b/headers/private/fs_shell/fssh_defs.h
@@ -24,6 +24,9 @@
 #define FSSH_B_MIME_TYPE_LENGTH		(FSSH_B_ATTR_NAME_LENGTH - 15)
 #define FSSH_B_MAX_SYMLINKS			16
 
+// Params
+#define FSSH_DEV_BSIZE				512
+
 // Open Modes
 #define FSSH_B_READ_ONLY 		FSSH_O_RDONLY	// read only
 #define FSSH_B_WRITE_ONLY 		FSSH_O_WRONLY 	// write only
diff --git a/src/add-ons/kernel/file_systems/bfs/kernel_interface.cpp b/src/add-ons/kernel/file_systems/bfs/kernel_interface.cpp
index b2aa325b12..8fbc685f19 100644
--- a/src/add-ons/kernel/file_systems/bfs/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/bfs/kernel_interface.cpp
@@ -90,7 +90,7 @@ fill_stat_buffer(Inode* inode, struct stat& stat)
 	} else
 		stat.st_size = inode->Size();
 
-	stat.st_blocks = inode->AllocatedSize() / 512;
+	stat.st_blocks = inode->AllocatedSize() / DEV_BSIZE;
 }
 
 
@@ -2226,7 +2226,7 @@ bfs_stat_index(fs_volume* _volume, const char* name, struct stat* stat)
 	stat->st_mode = node.Mode();
 
 	stat->st_size = node.data.Size();
-	stat->st_blocks = index.Node()->AllocatedSize() / 512;
+	stat->st_blocks = index.Node()->AllocatedSize() / DEV_BSIZE;
 
 	stat->st_nlink = 1;
 	stat->st_blksize = 65536;
diff --git a/src/add-ons/kernel/file_systems/btrfs/kernel_interface.cpp b/src/add-ons/kernel/file_systems/btrfs/kernel_interface.cpp
index cb2cc085aa..fc4c0ffda1 100644
--- a/src/add-ons/kernel/file_systems/btrfs/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/btrfs/kernel_interface.cpp
@@ -431,7 +431,7 @@ btrfs_read_stat(fs_volume* _volume, fs_vnode* _node, struct stat* stat)
 	inode->GetCreationTime(stat->st_crtim);
 
 	stat->st_size = inode->Size();
-	stat->st_blocks = (inode->Size() + 511) / 512;
+	stat->st_blocks = (inode->Size() + DEV_BSIZE - 1) / DEV_BSIZE;
 
 	return B_OK;
 }
diff --git a/src/add-ons/kernel/file_systems/cdda/kernel_interface.cpp b/src/add-ons/kernel/file_systems/cdda/kernel_interface.cpp
index 7e00236e67..9d228136e2 100644
--- a/src/add-ons/kernel/file_systems/cdda/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/cdda/kernel_interface.cpp
@@ -519,7 +519,7 @@ fill_stat_buffer(Volume* volume, Inode* inode, Attribute* attribute,
 		stat.st_type = attribute->Type();
 	} else {
 		stat.st_size = inode->Size() + sizeof(wav_header);
-		stat.st_blocks = inode->Size() / 512;
+		stat.st_blocks = inode->Size() / DEV_BSIZE;
 		stat.st_mode = inode->Type();
 		stat.st_type = 0;
 	}
diff --git a/src/add-ons/kernel/file_systems/exfat/kernel_interface.cpp b/src/add-ons/kernel/file_systems/exfat/kernel_interface.cpp
index 2145e65b89..b4342612a7 100644
--- a/src/add-ons/kernel/file_systems/exfat/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/exfat/kernel_interface.cpp
@@ -445,7 +445,7 @@ exfat_read_stat(fs_volume* _volume, fs_vnode* _node, struct stat* stat)
 	inode->GetCreationTime(stat->st_crtim);
 
 	stat->st_size = inode->Size();
-	stat->st_blocks = (inode->Size() + 511) / 512;
+	stat->st_blocks = (inode->Size() + DEV_BSIZE - 1) / DEV_BSIZE;
 
 	return B_OK;
 }
diff --git a/src/add-ons/kernel/file_systems/fat/bsd/sys/param.h b/src/add-ons/kernel/file_systems/fat/bsd/sys/param.h
index caadea751e..143cba2014 100644
--- a/src/add-ons/kernel/file_systems/fat/bsd/sys/param.h
+++ b/src/add-ons/kernel/file_systems/fat/bsd/sys/param.h
@@ -48,17 +48,6 @@
 #include "sys/types.h"
 
 
-#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
-#define DEV_BSIZE (1 << DEV_BSHIFT)
-
-#ifndef MAXPHYS				/* max raw I/O transfer size */
-#ifdef __ILP32__
-#define MAXPHYS		(128 * 1024)
-#else
-#define MAXPHYS		(1024 * 1024)
-#endif
-#endif
-
 /*
  * Machine-independent constants (some used in following include files).
  */
diff --git a/src/add-ons/kernel/file_systems/fat/kernel_interface.cpp b/src/add-ons/kernel/file_systems/fat/kernel_interface.cpp
index d89832aaf2..a7b84b10b2 100644
--- a/src/add-ons/kernel/file_systems/fat/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/fat/kernel_interface.cpp
@@ -1783,7 +1783,7 @@ dosfs_rstat(fs_volume* volume, fs_vnode* vnode, struct stat* stat)
 
 	fattime2timespec(fatNode->de_CDate, fatNode->de_CTime, fatNode->de_CHun, 1, &stat->st_crtim);
 
-	stat->st_blocks = howmany(fatNode->de_FileSize, 512);
+	stat->st_blocks = howmany(fatNode->de_FileSize, DEV_BSIZE);
 
 	RETURN_ERROR(status);
 }
diff --git a/src/add-ons/kernel/file_systems/iso9660/kernel_interface.cpp b/src/add-ons/kernel/file_systems/iso9660/kernel_interface.cpp
index 4d740bbfb1..52ca4c7250 100644
--- a/src/add-ons/kernel/file_systems/iso9660/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/iso9660/kernel_interface.cpp
@@ -496,7 +496,7 @@ fs_read_stat(fs_volume* _volume, fs_vnode* _node, struct stat* st)
 
 	// Same for file/dir in ISO9660
 	st->st_size = node->dataLen[FS_DATA_FORMAT];
-	st->st_blocks = (st->st_size + 511) / 512;
+	st->st_blocks = (st->st_size + DEV_BSIZE) / DEV_BSIZE;
 	if (ConvertRecDate(&(node->recordDate), &time) == B_NO_ERROR) {
 		st->st_ctim.tv_sec = st->st_mtim.tv_sec = st->st_atim.tv_sec = time;
 		st->st_ctim.tv_nsec = st->st_mtim.tv_nsec = st->st_atim.tv_nsec = 0;
diff --git a/src/add-ons/kernel/file_systems/layers/attribute_overlay/attribute_overlay.cpp b/src/add-ons/kernel/file_systems/layers/attribute_overlay/attribute_overlay.cpp
index bab61b6bf6..7a3119f407 100644
--- a/src/add-ons/kernel/file_systems/layers/attribute_overlay/attribute_overlay.cpp
+++ b/src/add-ons/kernel/file_systems/layers/attribute_overlay/attribute_overlay.cpp
@@ -1087,7 +1087,7 @@ AttributeEntry::ReadStat(struct stat *stat)
 	stat->st_mode = S_ATTR | 0x0777;
 	stat->st_type = fEntry->type;
 	stat->st_atime = stat->st_mtime = stat->st_crtime = time(NULL);
-	stat->st_blocks = (fEntry->size + stat->st_blksize - 1) / stat->st_blksize;
+	stat->st_blocks = (fEntry->size + DEV_BSIZE - 1) / DEV_BSIZE;
 	return B_OK;
 }
 
diff --git a/src/add-ons/kernel/file_systems/layers/write_overlay/write_overlay.cpp b/src/add-ons/kernel/file_systems/layers/write_overlay/write_overlay.cpp
index f8a224d1d0..1f1ab2d408 100644
--- a/src/add-ons/kernel/file_systems/layers/write_overlay/write_overlay.cpp
+++ b/src/add-ons/kernel/file_systems/layers/write_overlay/write_overlay.cpp
@@ -502,7 +502,7 @@ OverlayInode::ReadStat(struct stat *stat)
 		_PopulateStat();
 
 	memcpy(stat, &fStat, sizeof(struct stat));
-	stat->st_blocks = (stat->st_size + stat->st_blksize - 1) / stat->st_blksize;
+	stat->st_blocks = (stat->st_size + DEV_BSIZE - 1) / DEV_BSIZE;
 	return B_OK;
 }
 
diff --git a/src/add-ons/kernel/file_systems/nfs4/Inode.cpp b/src/add-ons/kernel/file_systems/nfs4/Inode.cpp
index 2bc8fc2fba..8f772eef58 100644
--- a/src/add-ons/kernel/file_systems/nfs4/Inode.cpp
+++ b/src/add-ons/kernel/file_systems/nfs4/Inode.cpp
@@ -642,8 +642,8 @@ Inode::GetStat(struct stat* st, OpenAttrCookie* attr)
 	delete[] values;
 
 	st->st_blksize = fFileSystem->Root()->IOSize();
-	st->st_blocks = st->st_size / st->st_blksize;
-	st->st_blocks += st->st_size % st->st_blksize == 0 ? 0 : 1;
+	st->st_blocks = st->st_size / DEV_BSIZE;
+	st->st_blocks += (st->st_size % DEV_BSIZE) == 0 ? 0 : 1;
 
 	return B_OK;
 }
diff --git a/src/add-ons/kernel/file_systems/packagefs/kernel_interface.cpp b/src/add-ons/kernel/file_systems/packagefs/kernel_interface.cpp
index 946c29b1b7..e66058267c 100644
--- a/src/add-ons/kernel/file_systems/packagefs/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/packagefs/kernel_interface.cpp
@@ -385,7 +385,7 @@ packagefs_read_stat(fs_volume* fsVolume, fs_vnode* fsNode, struct stat* st)
 	st->st_ctim = st->st_mtim;
 		// TODO: Perhaps manage a changed time (particularly for directories)?
 	st->st_crtim = st->st_mtim;
-	st->st_blocks = (st->st_size + 511) / 512;
+	st->st_blocks = (st->st_size + DEV_BSIZE - 1) / DEV_BSIZE;
 
 	return B_OK;
 }
diff --git a/src/add-ons/kernel/file_systems/ramfs/kernel_interface.cpp b/src/add-ons/kernel/file_systems/ramfs/kernel_interface.cpp
index db7bcf7372..7a0bcef485 100644
--- a/src/add-ons/kernel/file_systems/ramfs/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/ramfs/kernel_interface.cpp
@@ -700,7 +700,7 @@ ramfs_read_stat(fs_volume* _volume, fs_vnode* _node, struct stat *st)
 	st->st_gid = node->GetGID();
 	st->st_size = node->GetSize();
 	st->st_blksize = kOptimalIOSize;
-	st->st_blocks = (st->st_size + st->st_blksize - 1) / st->st_blksize;
+	st->st_blocks = (st->st_size + DEV_BSIZE - 1) / DEV_BSIZE;
 	st->st_atime = node->GetATime();
 	st->st_mtime = node->GetMTime();
 	st->st_ctime = node->GetCTime();
diff --git a/src/add-ons/kernel/file_systems/udf/kernel_interface.cpp b/src/add-ons/kernel/file_systems/udf/kernel_interface.cpp
index d28bc4684c..44e02abee7 100644
--- a/src/add-ons/kernel/file_systems/udf/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/udf/kernel_interface.cpp
@@ -291,7 +291,7 @@ udf_read_stat(fs_volume *_volume, fs_vnode *node, struct stat *stat)
 
 	stat->st_mode = icb->Mode();
 	stat->st_size = icb->Length();
-	stat->st_blocks = (stat->st_size + 511) / 512;
+	stat->st_blocks = (stat->st_size + DEV_BSIZE - 1) / DEV_BSIZE;
 
 	// File times. For now, treat the modification time as creation
 	// time as well, since true creation time is an optional extended