GEOM_MIRROR: Synchronization request failed (error=5).

[Jim Nasby]

On May 18, 2014, at 1:17 PM, Jim Nasby <jim at nasby.net> wrote:
> Trying to add a disk to an existing gmirror (which, unfortunately is sitting on a GPT partitioned drive):
> 
> GEOM_MIRROR: Synchronization request failed (error=5). ad4[WRITE(offset=141343457280, length=131072)]
> 
> Does this mean the new drive (ad4) is bad? smartmon doesn’t show anything and a quick bonnie++ test was OK.

More info:

Here’s what was in /var/log/messages right before that error:

May 18 17:36:13 noel kernel: GEOM_MIRROR: Device gm1: rebuilding provider ad4.
May 18 17:58:39 noel kernel: ad4: WARNING - WRITE_DMA48 UDMA ICRC error (retrying request) LBA=276061440
May 18 17:58:39 noel kernel: ad4: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR> error=10<NID_NOT_FOUND> LBA=276061440
May 18 17:58:39 noel kernel: GEOM_MIRROR: Synchronization request failed (error=5). ad4[WRITE(offset=141343457280, length=131072)]

After this I did gmirror forget, gmirror clear and then re-inserted ad4 into the mirror. As soon as that was done I started seeing this:

May 18 13:18:06 noel sudo:  decibel : TTY=pts/3 ; PWD=/home/decibel ; USER=root ; COMMAND=/sbin/gmirror insert gm1 ad4
May 18 18:18:06 noel kernel: GEOM_MIRROR: Device gm1: rebuilding provider ad4.
May 18 18:18:06 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=18176
May 18 18:18:07 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=233216
…
May 18 18:20:32 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=29618944
May 18 18:20:35 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=30076928
May 18 18:20:54 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=33539072

Look at http://lists.freebsd.org/pipermail/freebsd-questions/2005-August/095214.html, I tried changing the mode:

May 18 13:20:58 noel sudo:  decibel : TTY=pts/3 ; PWD=/home/decibel ; USER=root ; COMMAND=/sbin/atacontrol mode ad4
May 18 18:21:05 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=35777024
May 18 18:21:13 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=37299200
May 18 13:21:14 noel sudo:  decibel : TTY=pts/3 ; PWD=/home/decibel ; USER=root ; COMMAND=/sbin/atacontrol mode ad4 UDMA4

It didn’t help…

May 18 18:21:28 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=40399360
May 18 18:22:04 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=47683328
…
May 18 18:23:30 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=64849664
May 18 18:23:30 noel kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=64880896

Errors are still happening.

I can easily return the drive if that’s the problem here, but as I mentioned a bonnie++ test didn’t generate any errors.
-- 
Jim C. Nasby, Data Architect                       jim at nasby.net
512.569.9461 (cell)                         http://jim.nasby.net