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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