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How to recover corrupted files due to chkdsk



 
 
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Old August 16th 04, 03:17 PM
alphakry
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Default How to recover corrupted files due to chkdsk

( for Auhma members, this is also posted at
http://forum.aumha.org/viewtopic.php?t=7218 )

Quick Summary (detailed description below):

After rebooting my system, it randomly ran a utility
similar to CHKDSK - which displayed that it
was 'correcting' a large list of files. Upon entering
windows and playing some of my mp3's, the audio data is
altered. The filesize, name, mp3 tags and directory names
are all the same as before - but the audio of the mp3 is
swapped with some other mp3 - playing totally different
music then desired.


Detailed Description:Have I got a problem for you, which
baffles even me. As experts in this area, I hope that
this problem will not be new to you and you'll be able to
guide me towards the right path of correcting this error!
If you could take a few minutes to please review the
following explanation of my problem, it would be very
much appreciated!

The situation:

For the second time now, the audio data of my mp3s -
specifically newly added mp3's dating about a month old
or newer - has swapped itself with other audio data of
other mp3s. The filenames, directories, file size and
Tags all remain in original state, but the audio that
comes through the speaker - has changed.

Example: When attempting to play track 01 of my favorite
Jazz album - the audio that I will hear - will be track
05 of my favorite Rock album!

Tracks also have not just simply swapped... the track 05
of the Rock album that has replaced the track 01 - starts
mid song. As it progresses to track 02 of what should be
the Jazz album, it will instead continue from track 05 of
the rock album and eventually go to track 06 of the Rock
album. (An odd example but I hope it makes the problem
I'm having clear)

It's as if all the audio data of all my new mp3s, was
lined up as a giant stream of music - and then it was
shifted over without shifting over the actual files.

The cause:

I believe this has to do with Windows XP
repairing "corrupt files" on reboot. I can't exactly
remember what the program that popped up called the
files...but a large list scrolled, indicating that it was
repairing these files.

Nothing caused the system to shutdown in error before
this reboot. It was a simple power down. A newly
installed 120 GB hard drive had been installed into the
system, and had been completely updated by Windows
Update. The system had been reset and powered down in
success before, but it was this one time, upon rebooting
the system - a utility screen came up, similar to the
chkdsk utility, which began to scroll the many files -
"repairing" them. The hard drive in question in which
the files are contained, is not the OS hard drive - it's
a secondary storage drive - of 160 GB (149 GB formatted).

The chkdsk utility ran without any instruction to do so
by myself, on the secondary drive that had been working
perfectly with my previously installed HDD and WindowsXP.
Nothing was modified before or after installing this new
drive, so why it ran in the first place is still unknown.

My Thoughts:

Due to my discovery of this chkdsk utility (it may of
been a different utility - it ran in the light blue WinXP
screen after reboot, not in DOS) - I can only assume this
was the cause of the error. I didn't catch that utility
running last time I had this problem and dismissed it as
corrupt data due to the old age of the previous files I
had the problem with; and the large amount of internet
radio streams that I listen to, which I had thought was
the source of the newly replaced audio on the older
mp3s.)

I can only assume this was due to that utility making
some type of adjustments to file table - which has in
turn, caused the data to be swapped. Again - all file
names, file sizes, file locations, mp3 tags and directory
names have all remained the same - it's only the audio
data that has changed. I also think this has something to
do with the common error of Crosslinked files.

Fearing this may only be my PC - due to some file table
synchronization issue - I sent a few test mp3's to a
friend of mine - for him to play them on his PC to test
for this swapped audio issue. He reported that it also
played incorrectly on his system, which indicated that
the physical audio data of each file has indeed been
changed.

System Info:

Alienware Area-51
-----------------
P4 1.8ghz
512 RDRAM
Intel 850 Chipset
OS Drive: BRAND NEW WD 120gb 8mb 7200 JB Drive (less than
1 week of use, windowsxp was JUST installed before this
problem occured)
Problematic Drive: BRAND NEW 160gb Samsung 2mb 7200 Drive
(Less than 3 weeks of use... the files were transfered
over from an older drive about 2 weeks prior to this
problem)

I can't honestly say if I remember whether the first time
this happened was on this system or not... I think it
was, but can't be 100% certain.

The bios does show the drive correctly and all chkdsk's
that have been run have come back with no errors.

I would really like to talk to someone at Microsoft about
this - possibly a source code programmer or someone who
would know what could cause such an in-depth problem -
but it appears it's very hard to find methods of speaking
with such a person, especially for free...
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