Re: Trouble finding bad block on WDC WD1600SB-01KBA0

mathog wrote:
> Hi,
>
> One system has a WDC WD1600SB-01KBA0 which shows
>
> 197 Current_Pending_Sector  0x0012   200   200   000    Old_age   Always 
> 198 Offline_Uncorrectable   0x0012   200   200   000    Old_age   Always 
> 199 UDMA_CRC_Error_Count    0x000a   200   253   000    Old_age   Always 
>
> Sadly, it does not list the block number in any of the test results
> (or the system log files).
>
> Is there some other trick to find the thing?
>   
----
    Most of the time, you can't find the exact sector, but its an 
indication that the disk may had to move the data to a backup sector.

    Modern hard disks usually have 'tracks' of spare sectors that they can
reallocate (up to and including reallocating entire tracks) when they start
to detect weak and/or unreliable signals on _READ_.  They are a sign that
the disk is nearing the end of its useful life. 

    The smart diagnostics are not intended to be exact diagnostics but an
_Early_Warning_ system -- meaning that you had better move that data off to
a safer location. 

    Before the advent of the SMART diags, you could often hear a disk going
bad, as what was supposed to be sequential, linear reads, weren't.  You 
could
hear the excess seeking as the disk had to seek over to the replacement 
sectors
and back again.

    Really -- you should be ready to replace this disk "soon" (as soon 
as you can) and use any remaining life in it to make sure everything on 
it is backed
up.






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