On 2010-01-27 at 09:50 +0000 Darren J Moffat sent off:
> The whole point of the original question wasn't about consumers of
> ZFS but where ZFS is the consumer of block storage provided by
> something else that expects to see "zeros" on disk.
> 
> This thread is about "thin" provisioning *to* ZFS not *on* it.

you're right, indeed the original question is actually a different problem that
unwritten extents support wouldn't address.

Björn
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