Hard Drive Issues
Garrett Cooper
youshi10 at u.washington.edu
Tue Nov 7 23:25:29 UTC 2006
On Nov 7, 2006, at 1:49 PM, Richard McIntyre wrote:
> Tom Judge wrote:
>
>> Richard McIntyre wrote:
>>
>>> I'm having a similar problem,
>>> Oct 13 03:01:31 tco1 kernel: ad2: FAILURE - READ_DMA
>>> status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=181778119
>>> Oct 13 07:11:15 tco1 kernel: ad2: FAILURE - READ_DMA
>>> status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=181778119
>>>
>>> I'm assuming that particular sector on the drive is dying, I have
>>> backed everything up on the drive, can anyone give me more
>>> information, should the drive simply be replaced or is it
>>> possible that this is simply a TOC error and could be corrected
>>> by newfs to the drive?
>>>
>>> I'm guessing it will need to be replaced, output of smartctl is
>>> below....
>>>
>>> Thanks
>>> ~Richard
>>>
>>> Error 7742 occurred at disk power-on lifetime: 16036 hours (668
>>> days + 4 hours)
>>> When the command that caused the error occurred, the device was
>>> active or idle.
>>>
>>> After command completion occurred, registers were:
>>> ER ST SC SN CL CH DH
>>> -- -- -- -- -- -- --
>>> 40 51 04 c7 b6 d5 ea Error: UNC 4 sectors at LBA = 0x0ad5b6c7 =
>>> 181778119
>>> <etc>
>>
>>
>> Looks like you disk is on its way out, from the look of the above
>> errors, I would try dd'ing the disk onto a new disk the running
>> an fsck to make sure everything is ok. I wouldnt hold out much
>> hope for recovering the data on that sector though.
>>
>> Tom J
>>
>
> All,
>
> I've put a new disk into the system, The current disk is 200 GB,
> the new disk is 250 GB.
> If I run the command:
> dd if=/dev/ad2 of=/dev/ad3 conv=noerror
>
> Will this copy the (changing the appropriate device names of
> course) the disk as a whole? Will I lose the 50 GB difference?
> Is there another way? (like the dump, tar, or just plain copy
> command?)
>
> The drive is two partitions, one 100GB and the remainder on the
> other partition. The files contained are backups of my virtual
> hosted sites and the apache directories (including the apache/bin
> files).
>
> Any suggestions? I've read a good deal of forums online but they
> seem to be contradicting. 1/2 say I will loose the remainder of the
> drive space, 1/2 say that dd is not the best way to go. (there is
> roughly 35 GB of data actually on the device).
>
>
> FreeBSD tco1.thecompanyonline.com 5.3-RELEASE FreeBSD 5.3-RELEASE
> #0: Mon May 2 22:32:50 EDT 2005 rem at tco1.thecompanyonline.com:/
> usr/src/sys/i386/compile/TCO1.2005.05.02.001 i386
>
> Thank you for the help!
Too bad you can't just mount the disk image and grab files on
demand :(...
You should be able to expand the disk though if I remember correctly
using the tunefs command... don't have my terminal right in front of
me though to confirm whether or not this is the case though..
-Garrett
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