GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies
unavailable"
Radek Valášek
valin at buchlovice.org
Thu Oct 15 19:37:35 UTC 2009
Robert Noland napsal(a):
> 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.
>
>
Big thanks for the patches Robert, I will definitely test them as soon
as possible (tomorrow) and report the results immediately to list. I can
repeat this issue probably at any time (up to cca 30 times tested with
the same result), so don't bother about the broken booting, I'm prepared
for it...
vaLin
>> 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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