Re: GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies unavailable"

On Wed, 2009-10-28 at 09:42 +0200, alteriks_at_gmail.com wrote:
> Hi,
> I'm having same problem as Radek Valášek.
> I tried to install FreeBSD-8.0-RC1 on 3 GPT disks.
> I did step by step 'manual' from 
> http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/RAIDZ2
> I'd like to ask if this problem could be related to setting AHCI host 
> controller on?

I think that is unlikely.  If you type status at this point, does it
show all of your drives ONLINE?

> ZFS: i/o error - all block copies unavailable
> ZFS: can't read MOS
> ZFS: unexpected object set type lld
> ZFS: unexpected object set type lld

I'm trying to find the "can't read MOS" issue now.  This is pretty much
the first thing that we try to get once all of the drives are online.  I
can't produce this issue locally, so I'm trying to get enough debugging
to see what is going on with the root block pointer.  Basically, if we
can't read the MOS, we aren't going to read anything.

Thanks to ps_at_, we have a wrapper program that lets us debug this from
userland which helps a lot.  I just wish that I could figure out how to
replicate the problem, but I guess if I could do that... we could figure
out how to fix it.

robert.

> FreeBSD/i386 boot
> Default: z:/boot/kernel/kernel
> boot:
> ZFS: unexpected object set type lld
> 
> FreeBSD/i386 boot
> Default: tank:/boot/kernel/kernel
> boot:
> 
> FreeBSD/i386 boot
> Default: tank:/boot/kernel/kernel
> boot:
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-- 
Robert Noland <rnoland_at_FreeBSD.org>
FreeBSD