Bumping this because no one responded. Could this be because
it's such a stupid question no one wants to stoop to answering it,
or because no one knows the answer? Trying to picture, say, what
could happen in /var (say /var/adm/messages), let alone a swap
zvol, is giving me a headache...

On 07/09/10 17:00, Frank Middleton wrote:
This is a hypothetical question that could actually happen:

Suppose a root pool is a mirror of c0t0d0s0 and c0t1d0s0
and for some reason c0t0d0s0 goes off line, but comes back
on line after a shutdown. The primary boot disk would then
be c0t0d0s0 which would have much older data than c0t1d0s0.

Under normal circumstances ZFS would know that c0t0d0s0
needs to be resilvered. But in this case c0t0d0s0 is the boot
disk. Would ZFS still be able to correctly resilver the correct
disk under these circumstances? I suppose it might depend
on which files, if any, had actually changed...

Thanks -- Frank
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