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Hard Disk Files corrupted, how to restore

Posted on 2005-03-08
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Last Modified: 2011-09-20
I recently backed up some data from PC1 HDD on PC2.  Connection of HDD2 was using power cable of PC2.  PC1 was switched off and rebooted a few times so I think that may have had something to do with the problem.

Upon copying the backed up data back from PC2 to PC1, a number of folders were inaccessible totally.  chkdsk was loads or errors and went through files 30000 to 100000 fixing errors.  This made the data accessible but the problem is that

1) some files e.g. music is not as it should be, like chkdsk tried restored the wrong music to the wrong file, so music played is not the same artist as the file is labelled.
2) some file are totally inaccessible

The problem seems limited to multimedia files and I have tested the files on >1 PC so (although error messages suggest codecs etc) its not necessarily codec related.

Is there any other cause or solution to this?
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Question by:j_byron
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20 Comments
 
LVL 92

Expert Comment

by:nobus
ID: 13493833
Out of curiosity : >>   I recently backed up some data from PC1 HDD on PC2.  Connection of HDD2 was using power cable of PC2   <<< how did you backup the files? plain copy or a backup utility?
chkdsk errors create *.chk files; maybe you can recover some files with those :

http://www.diydatarecovery.nl/~tkuurstra/chkmate.htm                  Chk-mate (fileo1.chk)
http://www.ericphelps.com/uncheck/                              uncheck
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Author Comment

by:j_byron
ID: 13494694
Just copied the files
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LVL 92

Expert Comment

by:nobus
ID: 13494950
were both discs the same Fat? or was one fat32 and one ntfs?
did chk-mate help?
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Author Comment

by:j_byron
ID: 13494961
both ntfs, haven't had chance to check yet will post results here
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LVL 92

Expert Comment

by:nobus
ID: 13494993
well i never had problems with a stright copy. I would start thinking about bad ram, or a ba disc.
You can check the disk with the disc error checking utility of Xp; the memory you can test on both computers with memtest86+ from :   http://www.memtest.org/
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Author Comment

by:j_byron
ID: 13500476
Think its anything to do with the way i hooked up the power?  the drive is quite new, i just think something wasn't flushed properly but can't see how that would matter...
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LVL 92

Expert Comment

by:nobus
ID: 13503859
Yes, that can be, if you have write cachind enabled, and you shut down, before the actual write is finished. But then, you did not unhook the drive with the power on? or did you?
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Author Comment

by:j_byron
ID: 13528055
Sorry for the delay, the memory and hard disk tests are all fine.

No  I didn't un hook the hard disk whilst the power was on...

Oh, and a don't have enough .chk files to unchkdsk so I don't really think its looking good.

Any last chance thoughts?

Cheers anyway
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LVL 92

Expert Comment

by:nobus
ID: 13528297
>>  Oh, and a don't have enough .chk files to unchkdsk  << what do you mean?
and i never heard about a case where only the multimedia files were affected during a copy, so i think there is something else going on...
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Author Comment

by:j_byron
ID: 13528338
Even on both PC's?  I moved from pc1 to pc2, then back to pc1 yet there are problems on both ends (not as many though! - the files moved from pc1 whilst on pc2 could not be accessed at all without a chkdsk).  the music on pc2 is not as labelled, as if chkdsk tried to restore one song but got the wrong data.

get what i mean?
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LVL 92

Expert Comment

by:nobus
ID: 13528388
No, i do not get it.
copying digital data is very accurate, it creates an identical copy, no more, no less.
IF, you have a bad copy made the first time, of course , if you copy that , the result would be the same = bad.

So some questions : the backup from pc1 to pc 2 went without errors? No warnings? then the copy should be ok.

>>  Oh, and a don't have enough .chk files to unchkdsk  << what do you mean?
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Author Comment

by:j_byron
ID: 13528581
The backup was made fine.

I know for a fact that the original data was fine.  It strikes me as odd that the audio data from pc1 (backed up then restored) does not work at all, yet the audio data on pc2 (which has always been there i.e. another users data) had been mixed up with music by another artist, so the music albums are now incomplete.


---------


One of the links you gave said you can run uncheck with the .chk files to reverse the process, but I don't have enough to make a reverse.
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Author Comment

by:j_byron
ID: 13528594
Oh, most audio files on pc1 which have been rendered unusable are .wav, personal guitar recordings.  I have tested these on other pc's, its not just something to do with the software they were recorded on.

The files lost on pc 2 are .mp3.


There are loads of files los ton pc1, only a few opn pc1 (but so much music on pc2, won't ifnd out for ages to come).
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LVL 92

Expert Comment

by:nobus
ID: 13528599
can this help? mp3 recovery

http://www.winsite.com/bin/Info?500000014850
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Author Comment

by:j_byron
ID: 13528608
Anything for .wma/.wav?
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Author Comment

by:j_byron
ID: 13528613
Just incase, windows media player sometimes crashes whilst trying to play problem files.
Other times just doesn't play them (error).
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LVL 92

Expert Comment

by:nobus
ID: 13528618
try first unintalling it, then reinstall it. i'll look into the others...
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LVL 92

Accepted Solution

by:
nobus earned 200 total points
ID: 13528625
try pc inspector : (or one of the others)

http://www.runtime.org/                                    GetDataBack
http://www.stellarinfo.com/                                    Stellar
http://www.bitmart.net/                                    Restorer 2000
http://www.snapfiles.com/get/restoration.html                        Restoration
http://www.snapfiles.com/get/activeundelete.html                        Active undelete
http://www.pcinspector.de/file_recovery/UK/welcome.htm                  pc Inspector
http://www.snapfiles.com/get/smartrecovery.html                        flash recovery
http://www.ontrack.com/                                    ontrack
http://www.ontrack.com/easyrecoveryprofessional/                  Easy Recovery
http://www.cgsecurity.org                                    Test Disk + utils
http://www.z-a-recovery.com/setup.exe                              zero assumption
0
 

Author Comment

by:j_byron
ID: 13610659
Nothing seemed to work so the data is lots for good but i'll give the points as you gave lots of help.

Thanks very much
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