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....


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:
 -- -- -- -- -- -- --
40 51 04 c7 b6 d5 ea Error: UNC 4 sectors at LBA = 0x0ad5b6c7 = 181778119

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


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 [EMAIL PROTECTED]:/ 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..
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