diff --git a/sdk/lib/fslib/vfatlib/check/io.c b/sdk/lib/fslib/vfatlib/check/io.c
index 17db7a1c8e7..2eca2abdd4a 100644
--- a/sdk/lib/fslib/vfatlib/check/io.c
+++ b/sdk/lib/fslib/vfatlib/check/io.c
@@ -159,7 +159,7 @@ static off_t WIN32lseek(HANDLE fd, off_t offset, int whence)
 /******************************************************************************/
 
 
-void fs_open(PUNICODE_STRING DriveRoot, int read_write)
+NTSTATUS fs_open(PUNICODE_STRING DriveRoot, int read_write)
 {
     NTSTATUS Status;
     OBJECT_ATTRIBUTES ObjectAttributes;
@@ -180,11 +180,14 @@ void fs_open(PUNICODE_STRING DriveRoot, int read_write)
     if (!NT_SUCCESS(Status))
     {
         DPRINT1("NtOpenFile() failed with status 0x%.08x\n", Status);
-        return;
+        return Status;
     }
 
     // If read_write is specified, then the volume should be exclusively locked
-    if (read_write) fs_lock(TRUE);
+    if (read_write)
+    {
+        Status = fs_lock(TRUE);
+    }
 
     // Query geometry and partition info, to have bytes per sector, etc
 
@@ -192,6 +195,8 @@ void fs_open(PUNICODE_STRING DriveRoot, int read_write)
 
     changes = last = NULL;
     did_change = 0;
+
+    return Status;
 }
 
 BOOLEAN fs_isdirty(void)
@@ -231,6 +236,13 @@ NTSTATUS fs_lock(BOOLEAN LockVolume)
     if (!NT_SUCCESS(Status))
     {
         DPRINT1("NtFsControlFile() failed with Status 0x%08x\n", Status);
+#if 1
+        /* FIXME: ReactOS HACK for 1stage due to IopParseDevice() hack */
+        if (Status == STATUS_INVALID_DEVICE_REQUEST)
+        {
+            Status = STATUS_ACCESS_DENIED;
+        }
+#endif
     }
 
     return Status;
diff --git a/sdk/lib/fslib/vfatlib/check/io.h b/sdk/lib/fslib/vfatlib/check/io.h
index 1178cd1e5b0..23c6fd6a71f 100644
--- a/sdk/lib/fslib/vfatlib/check/io.h
+++ b/sdk/lib/fslib/vfatlib/check/io.h
@@ -34,7 +34,7 @@
 //#include <sys/types.h> /* for loff_t */
 // #include <fcntl.h>		/* for off_t */
 
-void fs_open(PUNICODE_STRING DriveRoot, int read_write);
+NTSTATUS fs_open(PUNICODE_STRING DriveRoot, int read_write);
 
 /* Opens the file system PATH. If RW is zero, the file system is opened
    read-only, otherwise, it is opened read-write. */
diff --git a/sdk/lib/fslib/vfatlib/vfatlib.c b/sdk/lib/fslib/vfatlib/vfatlib.c
index 267d3a12751..8db6e8a11af 100644
--- a/sdk/lib/fslib/vfatlib/vfatlib.c
+++ b/sdk/lib/fslib/vfatlib/vfatlib.c
@@ -383,6 +383,7 @@ VfatChkdsk(IN PUNICODE_STRING DriveRoot,
     BOOLEAN salvage_files;
     ULONG free_clusters;
     DOS_FS fs;
+    NTSTATUS Status;
 
     RtlZeroMemory(&fs, sizeof(fs));
 
@@ -403,7 +404,20 @@ VfatChkdsk(IN PUNICODE_STRING DriveRoot,
     salvage_files = TRUE;
 
     /* Open filesystem and lock it */
-    fs_open(DriveRoot, FsCheckFlags & FSCHECK_READ_WRITE);
+    Status = fs_open(DriveRoot, FsCheckFlags & FSCHECK_READ_WRITE);
+    if (Status == STATUS_ACCESS_DENIED)
+    {
+        /* We failed to lock, ask the caller whether we should continue */
+        if (Callback(VOLUMEINUSE, 0, NULL))
+        {
+            Status = STATUS_SUCCESS;
+        }
+    }
+    if (!NT_SUCCESS(Status))
+    {
+        fs_close(FALSE);
+        return STATUS_DISK_CORRUPT_ERROR;
+    }
 
     if (CheckOnlyIfDirty && !fs_isdirty())
     {