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Date:      Fri, 7 Dec 2012 16:56:17 +0100
From:      =?iso-8859-2?Q?Edward_Tomasz_Napiera=B3a?= <trasz@FreeBSD.org>
To:        Matt Burke <mattblists@icritical.com>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: ZFS hang
Message-ID:  <44B9F706-687A-4EB5-88FF-2688350E44D5@FreeBSD.org>
In-Reply-To: <50C1DDE8.9030503@icritical.com>
References:  <50C1CB34.3000308@icritical.com> <50C1DDE8.9030503@icritical.com>

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Wiadomość napisana przez Matt Burke w dniu 7 gru 2012, o godz. 13:15:
> After rebooting the box, I've just seen this on the console (after 'Setting
> hostid'):
> 
> (da8:isci0:0:0:0): READ(10). CDB: 28 0 4 21 53 8 0 1 0 0
> (da8:isci0:0:0:0): CAM status: SCSI Status Error
> (da8:isci0:0:0:0): SCSI status: Check Condition
> (da8:isci0:0:0:0): SCSI sense: MEDIUM ERROR asc:ffffffff,ffffffff (Reserved
> ASC/ASCQ pair)

[..]

> I can understand the drive failing, I just can't understand how it hung the
> system. I have had a similar thing happen on one of these machines before
> (with GENERIC and no dumpdev, so no debugging) with one of these disks on
> an Areca HBA.

Could you try to change the "failmode" zpool property (zpool set failmode=continue")
and see if it helps?  I seem to remember the default behaviour for ZFS is to wait
for a miracle to happen instead of returning Input/Output Error to the application.

-- 
If you cut off my head, what would I say?  Me and my head, or me and my body?



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