sun x2100 gmirror problem

[andrej at antiszoc.hu]

Hi,

We're using gmirror on our sun fire x2100 and FreeBSD 6.1-p10. Some days
ago I found this in the logs:

Apr  1 02:12:05 x2100 kernel: ad6: WARNING - WRITE_DMA48 UDMA ICRC error
(retrying request) LBA=612960533
Apr  1 02:12:05 x2100 kernel: ad6: FAILURE - WRITE_DMA48
status=51<READY,DSC,ERROR> error=10<NID_NOT_FOUND> LBA=612960533
Apr  1 02:12:05 x2100 kernel: GEOM_MIRROR: Request failed (error=5).
ad6[WRITE(offset=313835792896, length=4096)]
Apr  1 02:12:05 x2100 kernel: GEOM_MIRROR: Device gm0: provider ad6
disconnected.

Normally it looks like a disk error, but I think our half year old disks
(WD RE2) shouldn't fail after this short time. Of course they have moving
parts so they MAY fail. :( Yesterday I tried to reinit the sata channel
and insert the disk back into the mirror. I got this:

Apr  3 23:00:32 x2100 kernel: GEOM_MIRROR: Device gm0: provider ad6 detected.
Apr  3 23:00:32 x2100 kernel: GEOM_MIRROR: Device gm0: rebuilding provider
ad6.
Apr  3 23:00:36 x2100 kernel: ad6: WARNING - WRITE_DMA UDMA ICRC error
(retrying request) LBA=245760
Apr  3 23:00:38 x2100 kernel: ad6: WARNING - WRITE_DMA UDMA ICRC error
(retrying request) LBA=392576
Apr  3 23:00:38 x2100 kernel: ad6: WARNING - WRITE_DMA UDMA ICRC error
(retrying request) LBA=392960
Apr  3 23:00:53 x2100 kernel: ad6: FAILURE - device detached

After this, the disk disappeared from the sata channel completely.

The wierd is that we used the onboard nvidia-raid and the very same error
occured, but there was no report in the kernel the machine just don't
asked for operating system. Later I found out that the disk was forgotten
~2 weeks before that reboot (data was ~2 week old on it). Otherwise that
"forgotten/failed" disk was also half year old and was fine without a
problem.

Is there anybody who experienced something similar with SUN X2100 or any
other servers running FreeBSD 6 and sata?

Regards,
Andras