From owner-freebsd-geom@FreeBSD.ORG  Wed May  9 14:16:35 2012
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Date: Wed, 09 May 2012 15:16:36 +0100
From: Karl Pielorz <kpielorz_lst@tdx.co.uk>
To: freebsd-geom@FreeBSD.org
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Subject: FreeBSD 9-R amd64 - graid, should it survive 'pulling' a disk?
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Hi,

I've got a Supermicro X8DTL-IF running amd64 FreeBSD 9.0-R, using the 
onboard RAID (ICH10 based) and graid, with a RAID 1 mirror comprising of 
two Intel 320 series SSD's.

This works fine - but doesn't survive 'pulling' a disk. I realise this may 
not be a 'typical' disk failure scenario (i.e. the device just 
"disappearing") - but should it survive?

At the moment I get a panic with:

"
(ada0:ahcich0:0:0:0): lost device
g_vfs_done(): raid/r0p4[WRITE(offset=23737925632, length=131072)]error = 6
/usr3: got error 6 while accessing filesystem
panic: softdep_deallocate_dependancies: unrecovered I/O error
cpuid = 2
...
"

In the middle of the output is:

"
GEOM_RAID: Intel-441dffb: Disk ada0 state changed from ACTIVE to OFFLINE.
"

(Which is what you'd expect to see).

I can get more details - just thought I'd ask to see if this is something 
it should just cope with (i.e. having a disk yanked)?

Thanks,

-Karl