Date: Tue, 27 Oct 2009 11:17:40 +0100 From: "Merijn Verstraaten" <merijn@inconsistent.nl> To: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies unavailable" Message-ID: <op.u2gevqqg4534sa@localhost> In-Reply-To: <1256571299.2502.219.camel@balrog.2hip.net> References: <op.u2dqyh1o4534sa@localhost> <1256517106.2502.205.camel@balrog.2hip.net> <op.u2ehpmzo4534sa@localhost> <1256571299.2502.219.camel@balrog.2hip.net>
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My apologies to Robert for the double message, mis-addressed the first
reply to him instead of the list.
On Mon, 26 Oct 2009 16:34:59 +0100, Robert Noland <rnoland@freebsd.org>
wrote:
>> If I type status at this point I get:
>>
>> pool: tank
>> config:
>> NAME STATE
>> tank ONLINE
>> raidz1 ONLINE
>> ad4p3 ONLINE
>> ad6p3 ONLINE
>> ad8p3 ONLINE
>> ad10p3 ONLINE
>>
>> Which seems odd, since that's all the drives there are. So if it finds
>> these it's already found all drives. My optimistic "Oh! I'll try and
>> boot
>> again" spirit was however crushed since it just results in the same
>> error.
>
> Ok, that is both good and frustrating... I haven't produced any boot
> failures with all of the drives visible. Do, note that I just added
> support for reading gang blocks to the loader. (basically untested,
> since I haven't managed to create them at will) You will need to update
> your partition boot code for it to be supported during early boot. i.e.
> gpart bootcode -p /boot/gptzfsboot -i <boot partition> <disk>
I tried again yesterday evening by recompiling RELENG_8 and -CURRENT. I
somehow managed to boot into RELENG_8 the first time, but after that this
error comes up:
ZFS: i/o error - all block copies unavailable
ZFS: can't read object set for dataset ldd
Can't find root filesystem - giving up
ZFS: unexpected object set type ldd
ZFS: unexpected object set type ldd
FreeBSD/i386 boot
Default:/ tank:/boot/kernel/kernel
boot:
ZFS: unexpected object set type ldd
FreeBSD/i386 boot
Default:/ tank:/boot/kernel/kernel
boot: status
pool: tank
config:
NAME STATE
tank ONLINE
raidz1 ONLINE
ad4p3 ONLINE
ad6p3 ONLINE
ad8p3 ONLINE
ad10p3 ONLINE
After recompiling world/kernel for -CURRENT I get roughly the same error:
ZFS: i/o error - all block copies unavailable
ZFS: can't read object set for dataset 30
Can't find root filesystem - giving up
ZFS: unexpected object set type 0
ZFS: unexpected object set type 0
FreeBSD/i386 boot
Default:/ tank:/boot/kernel/kernel
boot:
ZFS: unexpected object set type ldd
FreeBSD/i386 boot
Default:/ tank:/boot/kernel/kernel
boot: status
pool: tank
config:
NAME STATE
tank ONLINE
raidz1 ONLINE
ad4p3 ONLINE
ad6p3 ONLINE
ad8p3 ONLINE
ad10p3 ONLINE
> The "all block copies unavailable" is a frustrating error, since all it
> means is a failed read, but we don't get a clue what failed or why.
> With the code that is in -CURRENT it will report gang blocks if found,
> even if it fails to read them.
> robert.
I've seen no mention of gang blocks in the errors so far.
Kind regards,
Merijn
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