On Tue, Nov 10, 2009 at 03:04:24PM -0600, Tim Cook wrote:
> No.  The whole point of a snapshot is to keep a consistent on-disk state
> from a certain point in time.  I'm not entirely sure how you managed to
> corrupt blocks that are part of an existing snapshot though, as they'd be
> read-only.

Physical corruption of the media
Something outside of ZFS diddling bits on storage

> The only way that should even be able to happen is if you took a
> snapshot after the blocks were already corrupted.  Any new writes would be
> allocated from new blocks.

It can be corrupted while it sits on disk.  Since it's read-only, you
can't force it to allocate anything and clean itself up.

-- 
Darren
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