From owner-freebsd-current@FreeBSD.ORG  Wed Nov 18 16:43:57 2009
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From: Robert Noland <rnoland@FreeBSD.org>
To: Emil Smolenski <ambsd@raisa.eu.org>
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Organization: FreeBSD
Date: Wed, 18 Nov 2009 10:43:48 -0600
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Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org
Subject: Re: 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"]
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On Wed, 2009-11-18 at 17:11 +0100, Emil Smolenski wrote:
> On Wed, 18 Nov 2009 14:50:47 +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)
> 
> > Ok, this is disturbing...  It works fine for me on -CURRENT / amd64 and
> > reports the root block pointer, which is what we need to locate the MOS.
> 
>   Booting from 8.0-*-amd64-memstick.img (Fixit# console) makes "zdb -uuu"  
> happy:
> 
> Fixit# zdb -uuu pgpool
> Uberblock
> 
>          magic = 0000000000bab10c
>          version = 13
>          txg = 443448
>          guid_sum = 9780688847620645377
>          timestamp = 1258560175 UTC = Wed Nov 18 16:02:55 2009
>          rootbp = [L0 DMU objset] 400L/200P DVA[0]=<0:220000de400:200>  
> DVA[1]=<0:2a80008ee00:200> DVA[2]=<0:330000b9000:200> fletcher4 lzjb LE  
> contiguous birth=443448 fill=298  
> cksum=8a9775385:3935d6d58c7:c028430c00a8:1b58ac4ebf42ac

Ok, the offsets are definately up there... What is your normal
installation?  8.0 i386?

robert.

-- 
Robert Noland <rnoland@FreeBSD.org>
FreeBSD