Date: Wed, 18 Nov 2009 01:17:20 +0100 From: "Emil Smolenski" <ambsd@raisa.eu.org> To: "Robert Noland" <rnoland@freebsd.org> Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org Subject: Boot with ZFS on single disk: "ZFS: i/o error - all block copies unavailable" [was: Re: GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies unavailable"] Message-ID: <op.u3kdq613qvde5b@bolt.zol> In-Reply-To: <1258497221.2303.66.camel@balrog.2hip.net> References: <op.u3hw9wl0qvde5b@am-laptop.local.org> <1258390784.2303.42.camel@balrog.2hip.net> <op.u3h252qaqvde5b@bolt.zol> <op.u3j6m8w5qvde5b@bolt.zol> <1258497221.2303.66.camel@balrog.2hip.net>
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On Tue, 17 Nov 2009 23:33:41 +0100, Robert Noland <rnoland@freebsd.org>
wrote:
>> Should I file a PR? I would
>> like to help in debugging it (however my skills in low-level C aren't
>> strong enough to do it on my own).
> Ok, the first thing I would like to see is "zdb -uuu".
# zdb -uuu pgpool
Segmentation fault: 11 (core dumped)
# zdb
pgpool
version=13
name='pgpool'
state=0
txg=439808
pool_guid=3920915583055727184
hostid=1642959122
hostname='unset'
vdev_tree
type='root'
id=0
guid=3920915583055727184
children[0]
type='disk'
id=0
guid=5859773264564918193
path='/dev/da0'
whole_disk=0
metaslab_array=23
metaslab_shift=35
ashift=9
asize=4500799356928
is_log=0
DTL=260
> I don't see an
> obvious issue with single disk reads. My own setup uses 2 x 1TB
> currently. Failing to read the MOS is basically the first read attempt
> from the pool, in fact it is the read that attempts to mount the pool.
--
am
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