CHKDSK results


S

SANTANDER

A Win XP PC shut down incorrectly due to a power outage. I run chkdsk c:
without parameters from MS-DOS window, after checking, there was the
following results:
---------------------
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\User>c:

C:\Documents and Settings\User> c:

C:\Documents and Settings\User>cd\

C:\>chkdsk
The type of the file system is NTFS.

WARNING! F parameter not specified.
Running CHKDSK in read-only mode.

CHKDSK is verifying files (stage 1 of 3)...
File verification completed.
CHKDSK is verifying indexes (stage 2 of 3)...
Index verification completed.
CHKDSK is recovering lost files.
Recovering orphaned file tmp.edb (84269) into directory file 9538.
CHKDSK is verifying security descriptors (stage 3 of 3)...
Security descriptor verification completed.
Correcting errors in the master file table's (MFT) BITMAP attribute.
Correcting errors in the Volume Bitmap.
Windows found problems with the file system.
Run CHKDSK with the /F (fix) option to correct these.

80027765 KB total disk space.
40040028 KB in 82450 files.
53632 KB in 4919 indexes.
0 KB in bad sectors.
185233 KB in use by the system.
65536 KB occupied by the log file.
39748872 KB available on disk.

4096 bytes in each allocation unit.
20006941 total allocation units on disk.
9937218 allocation units available on disk.

C:\>
 
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J

Jim

SANTANDER said:
A Win XP PC shut down incorrectly due to a power outage. I run chkdsk c:
without parameters from MS-DOS window, after checking, there was the
following results:
---------------------
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\User>c:

C:\Documents and Settings\User> c:

C:\Documents and Settings\User>cd\

C:\>chkdsk
The type of the file system is NTFS.

WARNING! F parameter not specified.
Running CHKDSK in read-only mode.

CHKDSK is verifying files (stage 1 of 3)...
File verification completed.
CHKDSK is verifying indexes (stage 2 of 3)...
Index verification completed.
CHKDSK is recovering lost files.
Recovering orphaned file tmp.edb (84269) into directory file 9538.
CHKDSK is verifying security descriptors (stage 3 of 3)...
Security descriptor verification completed.
Correcting errors in the master file table's (MFT) BITMAP attribute.
Correcting errors in the Volume Bitmap.
Windows found problems with the file system.
Run CHKDSK with the /F (fix) option to correct these.

80027765 KB total disk space.
40040028 KB in 82450 files.
53632 KB in 4919 indexes.
0 KB in bad sectors.
185233 KB in use by the system.
65536 KB occupied by the log file.
39748872 KB available on disk.

4096 bytes in each allocation unit.
20006941 total allocation units on disk.
9937218 allocation units available on disk.

C:\>
As the log shows, your disk has one orphaned file which ought to be put
somewher in some folder.
It also shows that the MFT has some errors.
It further shows that the volume bitmap has error.

The volume bitmap shows which sectors are free and which are allocated.
Now, if you attempt to write a file, and XP writes over a sector which is
shown to be free but actually belongs to
some file, this file will be corrupted. I don't know about you, but I would
not be pleased.

I am not certain what the error with the MFT bitmap attribute is, but I
would certainly want it fixed.

A good reference for NTFS is www.ntfs.com.

Jim
 
D

Daniel

I had a damaged cable which caused problems for me, I ran chkdsk with the F
switch and the problems were fixed, there is no big deal in running it.

cheers

Daniel
 
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S

SANTANDER

Jim said:
SANTANDER said:
A Win XP PC shut down incorrectly due to a power outage. I run chkdsk c:
without parameters from MS-DOS window, after checking, there was the
following results:
---------------------
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\User>c:

C:\Documents and Settings\User> c:

C:\Documents and Settings\User>cd\
C:\>chkdsk
The type of the file system is NTFS.
WARNING! F parameter not specified.
Running CHKDSK in read-only mode.
CHKDSK is verifying files (stage 1 of 3)...
File verification completed.
CHKDSK is verifying indexes (stage 2 of 3)...
Index verification completed.
CHKDSK is recovering lost files.
Recovering orphaned file tmp.edb (84269) into directory file 9538.
CHKDSK is verifying security descriptors (stage 3 of 3)...
Security descriptor verification completed.
Correcting errors in the master file table's (MFT) BITMAP attribute.
Correcting errors in the Volume Bitmap.
Windows found problems with the file system.
Run CHKDSK with the /F (fix) option to correct these.
80027765 KB total disk space.
40040028 KB in 82450 files.
53632 KB in 4919 indexes.
0 KB in bad sectors.
185233 KB in use by the system.
65536 KB occupied by the log file.
39748872 KB available on disk.
4096 bytes in each allocation unit.
20006941 total allocation units on disk.
9937218 allocation units available on disk.
--------------------
As the log shows, your disk has one orphaned file which ought to be put
somewher in some folder.
It also shows that the MFT has some errors.
It further shows that the volume bitmap has error.

The volume bitmap shows which sectors are free and which are allocated.
Now, if you attempt to write a file, and XP writes over a sector which is
shown to be free but actually belongs to
some file, this file will be corrupted. I don't know about you, but I
would not be pleased.

I am not certain what the error with the MFT bitmap attribute is, but I
would certainly want it fixed.

A good reference for NTFS is www.ntfs.com.

Jim
-----------

I heard that CHKDSK sometimes can show a false positive for data corruption.

Here is citation to some article:

Correcting errors in the Volume Bitmap. Windows found problems with the file
system.
Issue:

Correcting errors in the Volume Bitmap.
Windows found problems with the file system.
Run CHKDSK with the /F (fix) option to correct these.

Tis is a known issue and the error messages are not actually means that
there is problem in your system. You can safely ignore the error messages.
The reason you are seeing these errors appear is because when you run CHKDSK
in command prompt, it runs in "Read only" mode, and the state of the
computer is changing at the time you run the utility. A "read only" chkdsk
on an active NTFS volume will result in false positive errors, this is
normal.

Read-only CHKDSK will abort before it completes all three phases if it
encounters errors in earlier phases and is prone to falsely reporting errors
when in read-only mode. That is, CHKDSK may report that a disk is corrupted
even when there is no real corruption present. This can happen if NTFS
happens to modify areas of the disk on behalf of some program activity that
CHKDSK is examining at the same time.

To verify a volume correctly, the volume must be in a static state, and the
only
way to guarantee that state is to lock the volume. CHKDSK only locks the
volume
when it runs before entering Windows or in Recovery Console with /F or /R
(which
implies "F") is specified.

To verify this, you can restart your computer in Recovery Console and run
"CHKDSK /f" in there. See if you get any error messages. For more
information about how to use Recovery Console, please refer to the following
article:

Description of the Windows XP Recovery Console

http://support.microsoft.com/support/kb/articles/q314/0/58.asp
 

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