diff --git a/reactos/ntoskrnl/fs/mcb.c b/reactos/ntoskrnl/fs/mcb.c
new file mode 100644
index 00000000000..238cc10f537
--- /dev/null
+++ b/reactos/ntoskrnl/fs/mcb.c
@@ -0,0 +1,259 @@
+/* $Id: mcb.c,v 1.1 1999/08/20 16:29:22 ea Exp $
+ *
+ * reactos/ntoskrnl/fs/mcb.c
+ *
+ */
+#include <ntos.h>
+
+#include <internal/debug.h>
+
+/**********************************************************************
+ * NAME							EXPORTED
+ *
+ * DESCRIPTION
+ *	
+ * ARGUMENTS
+ *
+ * RETURN VALUE
+ *
+ * NOTES
+ */
+VOID
+STDCALL
+FsRtlAddLargeMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2,
+	DWORD	Unknown3,
+	DWORD	Unknown4,
+	DWORD	Unknown5,
+	DWORD	Unknown6
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlAddMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2,
+	DWORD	Unknown3
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlGetNextLargeMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2,
+	DWORD	Unknown3,
+	DWORD	Unknown4
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlGetNextMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2,
+	DWORD	Unknown3,
+	DWORD	Unknown4
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlInitializeLargeMcb (
+	DWORD	Unknown0,
+	DWORD	Unknown1
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlInitializeMcb (
+	DWORD	Unknown0,
+	DWORD	Unknown1
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlLookupLargeMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2,
+	DWORD	Unknown3,
+	DWORD	Unknown4,
+	DWORD	Unknown5,
+	DWORD	Unknown6,
+	DWORD	Unknown7
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlLookupLastLargeMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlLookupLastMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlLookupMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2,
+	DWORD	Unknown3,
+	DWORD	Unknown4
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlNumberOfRunsInLargeMcb (
+	DWORD	Unknown0
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlNumberOfRunsInMcb (
+	DWORD	Unknown0
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlRemoveLargeMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2,
+	DWORD	Unknown3,
+	DWORD	Unknown4
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlRemoveMcbEntry (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlSplitLargeMcb (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2,
+	DWORD	Unknown3,
+	DWORD	Unknown4
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlTruncateLargeMcb (
+	DWORD	Unknown0,
+	DWORD	Unknown1,
+	DWORD	Unknown2
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlTruncateMcb (
+	DWORD	Unknown0,
+	DWORD	Unknown1
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+VOID
+STDCALL
+FsRtlUninitializeLargeMcb (
+	DWORD	Unknown0
+	)
+{
+	UNIMPLEMENTED;
+}
+
+
+VOID
+STDCALL
+FsRtlUninitializeMcb (
+	DWORD	Unknown0
+	)
+{
+	UNIMPLEMENTED
+}
+
+
+/* EOF */
+
diff --git a/reactos/ntoskrnl/fs/util.c b/reactos/ntoskrnl/fs/util.c
new file mode 100644
index 00000000000..e325506b447
--- /dev/null
+++ b/reactos/ntoskrnl/fs/util.c
@@ -0,0 +1,118 @@
+/* $Id: util.c,v 1.1 1999/08/20 16:29:22 ea Exp $
+ *
+ * reactos/ntoskrnl/fs/util.c
+ *
+ */
+#include <ntos.h>
+
+
+/**********************************************************************
+ * NAME							EXPORTED
+ *	FsRtlIsTotalDeviceFailure@4
+ *
+ * DESCRIPTION
+ *	Check if an NTSTATUS error code represents a
+ *	disk hardware failure.
+ *	
+ * ARGUMENTS
+ *	NtStatus
+ *		NTSTATUS to test.
+ *
+ * RETURN VALUE
+ *	FALSE if either (NtStatus >= STATUS_SUCCESS), 
+ *	STATUS_CRC_ERROR, 0xC000009C; TRUE otherwise.
+ *
+ * NOTES
+ *	By calling the function with all possible values,
+ *	one unknown NTSTATUS value makes the function
+ *	return TRUE (0xC000009C).
+ */
+BOOLEAN
+STDCALL
+FsRtlIsTotalDeviceFailure (
+	NTSTATUS	NtStatus
+	)
+{
+	return (
+		(NT_SUCCESS(NtStatus))
+		|| (STATUS_CRC_ERROR == NtStatus)
+		|| (STATUS_UNKNOWN_C000009C == NtStatus) /* FIXME */
+		? FALSE
+		: TRUE
+		);
+}
+
+
+/**********************************************************************
+ * NAME							EXPORTED
+ *	FsRtlIsNtstatusExpected@4
+ *
+ * DESCRIPTION
+ *	Check an NTSTATUS value is expected by the FS kernel
+ *	subsystem.
+ *
+ * ARGUMENTS
+ *	NtStatus
+ *		NTSTATUS to test.
+ *
+ * RETURN VALUE
+ *	TRUE if NtStatus is either STATUS_ACCESS_VIOLATION,
+ *	STATUS_ILLEGAL_INSTRUCTION, 0x80000002, 0xC00000AA;
+ *	FALSE otherwise.
+ *
+ * NOTES
+ *	By calling the function with all possible values,
+ *	two unknown NTSTATUS values make the function
+ *	return 0x00 (0x80000002, 0xC00000AA).
+ */
+BOOLEAN
+STDCALL
+FsRtlIsNtstatusExpected (
+	NTSTATUS	NtStatus
+	)
+{
+	return (
+		(STATUS_UNKNOWN_80000002 == NtStatus)  /* FIXME */
+		|| (STATUS_ACCESS_VIOLATION == NtStatus)
+		|| (STATUS_ILLEGAL_INSTRUCTION == NtStatus)
+		|| (STATUS_UNKNOWN_C00000AA == NtStatus)  /* FIXME */
+		)
+		? TRUE
+		: FALSE;
+}
+	
+
+/**********************************************************************
+ * NAME							EXPORTED
+ *	FsRtlNormalizeNtstatus@8
+ *
+ * DESCRIPTION
+ *	Normalize an NTSTATUS value for using in the FS subsystem.
+ *
+ * ARGUMENTS
+ *	NtStatusToNormalize
+ *		NTSTATUS to normalize.
+ *	NormalizedNtStatus
+ *		NTSTATUS to return if the NtStatusToNormalize
+ *		value is unexpected by the FS kernel subsystem.
+ *
+ * RETURN VALUE
+ * 	NtStatusToNormalize if it is an expected value,
+ * 	otherwise NormalizedNtStatus.
+ */
+NTSTATUS
+STDCALL
+FsRtlNormalizeNtstatus (
+	NTSTATUS	NtStatusToNormalize,
+	NTSTATUS	NormalizedNtStatus
+	)
+{
+	return
+		(TRUE == FsRtlIsNtstatusExpected(NtStatusToNormalize))
+		? NtStatusToNormalize
+		: NormalizedNtStatus;
+}
+
+
+/* EOF */
+