diff --git a/src/apps/bootmanager/BootManagerController.cpp b/src/apps/bootmanager/BootManagerController.cpp
index 7cc5fcdf5e..4899983cce 100644
--- a/src/apps/bootmanager/BootManagerController.cpp
+++ b/src/apps/bootmanager/BootManagerController.cpp
@@ -297,12 +297,18 @@ BootManagerController::_CreateErrorEntryPage()
 {
 	BString description;
 
-	if (fCollectPartitionsStatus == B_PARTITION_TOO_SMALL) {
+	if (fCollectPartitionsStatus == B_ENTRY_NOT_FOUND) {
 		description << B_TRANSLATE_COMMENT("Partition table not compatible",
 				"Title") << "\n\n"
 			<< B_TRANSLATE("The partition table of the first hard disk is not "
 				"compatible with Boot Manager.\n"
-				"Boot Manager needs 2 KB available space before the first "
+				"Boot Manager only works with IBM PC MBR partitions.");
+	} else if (fCollectPartitionsStatus == B_PARTITION_TOO_SMALL) {
+		description << B_TRANSLATE_COMMENT("First partition starts too early",
+				"Title") << "\n\n"
+			<< B_TRANSLATE("The first partition on the disk starts too early "
+				"and does not leave enough space free for a boot menu.\n"
+				"Boot Manager needs 2 KiB available space before the first "
 				"partition.");
 	} else {
 		description << B_TRANSLATE_COMMENT("Error reading partition table",
diff --git a/src/apps/bootmanager/DrivesPage.cpp b/src/apps/bootmanager/DrivesPage.cpp
index 0326b3b9bd..43a96cefdf 100644
--- a/src/apps/bootmanager/DrivesPage.cpp
+++ b/src/apps/bootmanager/DrivesPage.cpp
@@ -164,9 +164,22 @@ DriveItem::DrawItem(BView* owner, BRect frame, bool complete)
 	if (fCanBeInstalled != B_OK) {
 		owner->SetHighColor(140, 0, 0);
 		owner->MovePenBy(fBaselineOffset, 0);
-		owner->DrawString(fCanBeInstalled == B_PARTITION_TOO_SMALL
-			? B_TRANSLATE_COMMENT("No space available!", "Cannot install")
-			: B_TRANSLATE_COMMENT("Cannot access!", "Cannot install"));
+		const char* message;
+		switch (fCanBeInstalled) {
+			case B_PARTITION_TOO_SMALL:
+				message = B_TRANSLATE_COMMENT("No space available!",
+					"Cannot install");
+				break;
+			case B_ENTRY_NOT_FOUND:
+				message = B_TRANSLATE_COMMENT("Incompatible format!",
+					"Cannot install");
+				break;
+			default:
+				message = B_TRANSLATE_COMMENT("Cannot access!",
+					"Cannot install");
+				break;
+		}
+		owner->DrawString(message);
 	}
 
 	owner->PopState();
diff --git a/src/apps/bootmanager/LegacyBootMenu.cpp b/src/apps/bootmanager/LegacyBootMenu.cpp
index 9fe02be795..185b31d376 100644
--- a/src/apps/bootmanager/LegacyBootMenu.cpp
+++ b/src/apps/bootmanager/LegacyBootMenu.cpp
@@ -318,11 +318,12 @@ LegacyBootMenu::CanBeInstalled(const BootDrive& drive)
 	PartitionVisitor visitor;
 	device.VisitEachDescendant(&visitor);
 
+	if (!visitor.HasPartitions())
+		return B_ENTRY_NOT_FOUND;
+
 	// Enough space to write boot menu to drive?
-	if (!visitor.HasPartitions()
-		|| visitor.FirstOffset() < (int)sizeof(kBootLoader)) {
+	if (visitor.FirstOffset() < (int)sizeof(kBootLoader))
 		return B_PARTITION_TOO_SMALL;
-	}
 
 	return B_OK;
 }