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

Bruce Allen <[email protected]> Wed, 11 Jan 2017 09:41:14 +0000
Newsgroups	gmane.linux.utilities.smartmontools
Message-ID	<[email protected]>
David, I think the UDMA_CRC_ERROR_COUNT is referring to a crc error on the data bus.  If that is right then it can be safely ignored; if it is recurring I would try and clean and replug the data connections to the drive.  Cheers, Bruce



> On 11 Jan 2017, at 02:15, mathog <[email protected]> wrote:
> 
> On 10-Jan-2017 02:07, Carlos E. R. wrote:
>> On 2017-01-10 02:12, mathog wrote:
>>> Hi,
>>> 
>>> One system has a WDC WD1600SB-01KBA0 which shows
>>> 
>>> 197 Current_Pending_Sector  0x0012   200   200   000    Old_age
>>> Always
>>>       -       1
>>> 198 Offline_Uncorrectable   0x0012   200   200   000    Old_age
>>> Always
>>>       -       0
>>> 199 UDMA_CRC_Error_Count    0x000a   200   253   000    Old_age
>>> Always
>>>       -       1
>> 
>>> Is there some other trick to find the thing?
>> 
>> I run "badblocks" with the intention of locating them, and they
>> disappeared...
> 
> Rebooted that node into PLD Rescue CD over the network, ssh'd into it
> and ran
> 
>    badblocks -nvs /dev/sda >/tmp/bb.log 2>&1 &
> 
> somewhere along the line the pending sector cleared, but there was no
> message
> giving the block number, and it said there were no errors.  The
> UDMA_CRC_ERROR_COUNT is still 1.
> 
> So that worked.
> 
> Now, for the next time, is there a command one can use
> while the OS is running and the disk mounted that can do something
> similar?
> badblocks -n isn't happy running on mounted disks, and that badblocks
> command took ~4.5 hours.
> 
> Thanks,
> 
> David Mathog
> [email protected]
> Manager, Sequence Analysis Facility, Biology Division, Caltech
> 
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Bruce Allen, Adjunct Professor of Physics
Leonard E. Parker Center for Gravitation, Cosmology and Astrophysics
Physics Department
University of Wisconsin - Milwaukee
3135 N Maryland Ave
Milwaukee, 53211 USA
Tel: +1 414-229-4474
Fax: +1 414-229-5589
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