From owner-freebsd-current@FreeBSD.ORG  Wed Jul  6 15:44:43 2011
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From: Berczi Gabor <freebsd@berczi.be>
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Date: Wed, 6 Jul 2011 17:44:41 +0200
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Subject: ZFS boot fails with two pools
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Greets,

For some reason FreeBSD can't boot automatically:

ZFS: i/o error - all block copies unavailable
ZFS: can't read MOS object directory
Can't find root filesystem - giving up
ZFS: unexpected object set type 0
ZFS: unexpected object set type 0

FreeBSD/x86 boot
Default: data:/boot/kernel/kernel
boot:
ZFS: unexpected object set type 0

FreeBSD/x86 boot
Default: data:/boot/kernel/kernel
boot:

I have two pools, pool2 which is a mirrored zpool, and data being a =
raid-z pool. Note how the default should be "pool2:/boot/zfsloader". How =
can I fix this?

Thx.