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

On Thu, 2009-10-15 at 14:08 +0200, Radek Valášek wrote:
> Hi,
> 
> I want to ask if there is something new in adding support to 
> gptzfsboot/zfsboot for reading gang-blocks?

Ok, I can't figure out any way to test this... beyond the fact that it
builds and doesn't break my currently working setup.  Can you give this
a try?  It should still report if it finds gang blocks, but hopefully
now will read them as well.

robert.

>  From Sun's docs:
> 
> Gang blocks
> 
> When there is not enough contiguous space to write a complete block, the ZIO
> pipeline will break the I/O up into smaller 'gang blocks' which can later be
> assembled transparently to appear as complete blocks.
> 
> Everything works fine for me, until I rewrite kernel/world after system 
> upgrade to latest one (releng_8). After this am I no longer able to boot 
> from zfs raidz1 pool with following messages:
> 
>  >/ 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
> />/
> />/ FreeBSD/i386 boot
> />/ Default: z:/boot/kernel/kernel
> />/ boot:
> />/ ZFS: unexpected object set type lld
> />/
> />/ FreeBSD/i386 boot
> />/ Default: tank:/boot/kernel/kernel
> />/ boot:
> //
> /I presume it's the same issue as talked in june-2009 current mailing 
> list 
> http://lists.freebsd.org/pipermail/freebsd-current/2009-June/008589.html
> 
> Any success in that matter?
> 
> Thnx for answer.
> 
> vaLin
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-- 
Robert Noland <rnoland_at_FreeBSD.org>
FreeBSD