Booting from ZFS raidz

[Jonathan Noack]

On Sun, June 14, 2009 00:09, Jonathan Noack wrote:
> On Fri, May 15, 2009 19:07, Jonathan Noack wrote:
>> On Thu, May 14, 2009 10:25, Doug Rabson wrote:
>>> I fixed a bug in the patch. Try this version:
>>> http://people.freebsd.org/~dfr/raidzboot-14052009.diff
>>
>> I know the bug fix was for booting from degraded pools, but I can at
>> least
>> give you a "no regression" report.  I just set up a new amd64 box and
>> was
>> able to boot from a raidz1 pool using your latest patch.
>>
>> Getting this working from scratch was tedious but not too complicated.
>> I
>> followed lulf's instructions
>> (http://blogs.freebsdish.org/lulf/2008/12/16/setting-up-a-zfs-only-system/)
>> using the May snapshot fixit CD.  Only differences were that I set up
>> all
>> 4 disks with gpart (identically), created a raidz1 pool, and used a
>> patched gptzfsboot that I cross-compiled on my 7.2 i386 box for the
>> bootcode (applied to all 4 disks).
>>
>> If only I had remembered to patch my /usr/src tree before rebuilding
>> world
>> and rebooting... *sigh*  Once more unto the fixit breach... :)
>
> This (and the committed version) had been working fine for me on my stock
> amd64 CURRENT system until I rebuilt world/kernel on 5/30 and rebooted.  I
> get the following error on boot (hand transcribed so hopefully I didn't
> screw it up):
> ************************************************************
> ZFS: i/o error - all block copies unavailable
> ZFS: can't read object set for dataset lld
> Can't find root filesystem - giving up
> ZFS: unexpected object set type lld
> ZFS: unexpected object set type lld
>
> FreeBSD/i386 boot
> Default: tank:/boot/kernel/kernerl
> boot:
> ZFS: unexpected object set type lld
>
> FreeBSD/i386 boot
> Default: tank:/boot/kernel/kernel
> boot:
> ************************************************************
>
> The previously working world/kernel was from 5/26.  I haven't had much
> time to troubleshoot until today.  I can use the fixit CD to access the
> ZFS pool with no issues; the problem appears to just be the boot code.  I
> cross-built a fresh world on my i386 system today, reinstalled everything
> in /boot, reinstalled gptzfsboot, and still got the same results.
>
> What steps should I take to troubleshoot and resolve this?

Anyone know how I should proceed?  I'm really frustrated that I haven't
been able to get this working.

Thanks,
-Jon