gmirror or ata problem

[Simon L. Nielsen]

On 2007.01.30 09:51:14 +0100, Oliver Fromme wrote:

> This is strange.  gmirror just detached one of its disks
> for no apparent reason.  I've built a mirror consisting of
> the components ad0 and ad1 (both SATA drives).  It has
> been running fine.  This is RELENG_6 from 2006-12-20.
> 
> Yesterday evening ad1 was detached.  There is no other
> error message logged on console or in the logs (i.e. no
> I/O error such as a bad sector or anything).  There was
> no particularly high load at that time.  In fact, the
> machine had been under much higher load before, without
> anything bad happening.
> 
> This is from the logs:
> 
> Jan 29 19:10:13 pluto -- MARK --
> Jan 29 19:20:26 pluto kernel: ad1: FAILURE - device detached
> Jan 29 19:20:26 pluto kernel: subdisk1: detached
> Jan 29 19:20:26 pluto kernel: ad1: detached
> Jan 29 19:20:26 pluto kernel: GEOM_MIRROR: Cannot write metadata on ad1 (device=gm0, error=6).
> Jan 29 19:20:26 pluto kernel: GEOM_MIRROR: Cannot update metadata on disk ad1 (error=6).
> Jan 29 19:20:26 pluto kernel: GEOM_MIRROR: Cannot update metadata on disk ad1 (error=6).
> Jan 29 19:20:26 pluto kernel: GEOM_MIRROR: Device gm0: provider ad1 disconnected.
> Jan 29 19:50:13 pluto -- MARK --

I have seen similar problems on my graid3.  I think it's simply the
disk which stops responding to commands, or at least ata(4) can't talk
to the disk anymore...

I see it on:

ad10: 305245MB <WDC WD3200SD-01KNB0 08.05J08> at ata5-master SATA150
ad12: 305245MB <WDC WD3200SD-01KNB0 08.05J08> at ata6-master SATA150
ad14: 305245MB <WDC WD3200YS-01PGB0 21.00M21> at ata7-master SATA150

After a reboot everything seems fine again and my RAID is rebuilt.

I don't know why it happens, but it sucks :-/.  I'm running 7-CURRENT
BTW.

-- 
Simon L. Nielsen