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chkdsk won't remove bad clusters
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Windows 2000 Annoyances Discussion Forum
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chkdsk won't remove bad clusters
Wednesday, May 6, 2009 at 5:49 am
Posted by gordon451
(4 messages posted)
G'day all. I have W2K SP4, and use a Western Digital WD800BB-22JHC0 -- 80GB -- as
my D: drive. I run chkdsk occasionally, just to make sure, and the other day I discovered
a very large amount of bad clusters "being replaced". So I ran chkdsk a second time
(the boot-up option). And got exactly the same list of clusters being replaced!
Every time I run chkdsk it finishes up a 45-minute task by telling me there are
no bad clusters!
I should say that all the problems are confined to some Bit-Torrents in one folder.
I have Adenix SMART Explorer installed, and it reports 100% reliability -- ie: no
problems or errors.
I am discounting funny data, as I was told chkdsk performs write-back to all data
to see if the results match the original read.
So the question is: does, or does not, chkdsk fix files and mark bad clusters?
Gordon.
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re: chkdsk won't remove bad clusters
Wednesday, May 6, 2009 at 7:07 am
Posted by Steve
(21647 messages posted)
I replace a Drive when it starts acting that way.
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re: chkdsk won't remove bad clusters
Wednesday, May 6, 2009 at 1:29 pm
Posted by DEX
(11846 messages posted)
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On Wednesday, May 6, 2009 at 5:49 am, gordon451 wrote:
>G'day all. I have W2K SP4, and use a Western Digital WD800BB-22JHC0 -- 80GB --
as
>my D: drive. I run chkdsk occasionally, just to make sure, and the other day I
discovered
>a very large amount of bad clusters "being replaced". So I ran chkdsk a second
time
>(the boot-up option). And got exactly the same list of clusters being replaced!
> Every time I run chkdsk it finishes up a 45-minute task by telling me there are
>no bad clusters!
>
>I should say that all the problems are confined to some Bit-Torrents in one folder.
>
>I have Adenix SMART Explorer installed, and it reports 100% reliability -- ie: no
>problems or errors.
>
>I am discounting funny data, as I was told chkdsk performs write-back to all data
>to see if the results match the original read.
>
>So the question is: does, or does not, chkdsk fix files and mark bad clusters?
>
>Gordon.
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re: chkdsk won't remove bad clusters
Thursday, May 7, 2009 at 5:29 am
Posted by gordon451
(4 messages posted)
@Dex - Sorry, I think I'm missing something [:( I have noticed that chkdsk in W2K
is different from W9x -- one of them is I can't easily chkdsk on the fly! BTW, I
should have mentioned I use NTFS on both drives.
@Steve - I have had my suspicions about the drive. I bought two of them, the first
saw duty on my old W98SE box, but I put it back in the wrapper and used this one
from basically brand new in this box when I bought it. Naturally I formatted the
disk while installing the OS on C:. I installed Adenix SMART Explorer to monitor
my drive health, and it shows no problems.
Gordon.
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re: chkdsk won't remove bad clusters
Thursday, May 7, 2009 at 11:07 am
Posted by C K
(6525 messages posted)
Western Digital has a diagnostics utility designed for their drives to check it.
You really can't check a drive properly on the fly while a program or operating
system is running. Download the WD utility and check the drive as per their instructions.
Even then, it won't catch all errors due to the possibility that the addressing
on the electronics may have faults and failures. MS chkdsk is only a light duty
app that marks clusters as bad and not to be used. It can't repair or save corrupted
data. It can't truely do what the WD utility can to "replace" clusters when some
go bad, or what Spinrite can do to try and recover bad clusters. If data is corrupted
from a bad cluster, is impossible to repair it. That's when you need a back up.
Only particular RAID system have a safety net to keep your data safer from corruption.
If the fault lies in particular areas of the drive where important info is kept (MBR,
directories etc), then MS utilities can't cure that issue and you can see the results
that you are seeing.
Another excellent utility that I use all the time is Spinrite from GRC.com It can
test a drive and the surface extensively along with giving you a host of other info
about the drive. Well worth the cost I have found over the years. Check it out..
I checked the program you mention and found it didn't do anything more than give
you a GUI to the already monitoring SMART etc from the drive. When SMART is triggered
you will get a message of pending problems as reported by the HDD, on bootup or from
the operating system. The program you are using doesn't do ANY testing of the HDD
to find surface problems idependent of the HDD's own error correcting/detecting system.
Spinrite will, and it will activate spare sectors to replace bad ones when found
if you want it to. If there are any left, the newer HDD's do this behind the scenes.
If it can't or doesn't, then you are out of spares or there are other problems preventing
it from doing this. In that case, the drive is unreliable and should be taken out
of service. It could suffer a catastrophic failure at anytime in my opnion.
Keep an eye on your event viewer for errors pertianing to the HDD.. If you see them,
it's time to stop using the drive and replace it if it is still under warranty.
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re: chkdsk won't remove bad clusters
Monday, May 25, 2009 at 1:34 am
Posted by NigelHH
(1176 messages posted)
I seem to remember that chkdsk indicates that it is fixing clusters, but does not
actually do it unless the /f option is used...
It also has a /r option to check the disk for hard errors.
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re: chkdsk won't remove bad clusters
Friday, May 29, 2009 at 1:45 am
Posted by gordon451
(4 messages posted)
Ummm... Problem solved!!!!
Thanks to all who responded.
It seems that incomplete (unfinished) torrents look like bad clusters to chkdsk.
Once I archived the offending torrents and deleted the files (and this INCLUDES
the Recycle Bin), then the bad cluster problem disappeared.
Cheers, Gordon.
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