Bill Sommerfeld wrote:
There also may be a reason to do this when confidentiality isn't
required: as a sparse provisioning hack..
If you were to build a zfs pool out of compressed zvols backed by
another pool, then it would be very convenient if you could run in a
mode where freed blocks were overwritten by zeros when they were freed,
because this would permit the underlying compressed zvol to free *its*
blocks.
A very interesting observation. Particularly given that I have just
created such a configuration - with iSCSI in the "middle".
--
Darren J Moffat
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