On 2013-01-22 14:29, Darren J Moffat wrote:
Preallocated ZVOLs - for swap/dump.


Sounds like something I proposed on these lists, too ;)
Does this preallocation only mean filling an otherwise ordinary
ZVOL with zeroes (or some other pattern) - if so, to what effect?

Or is it also supported to disable COW for such datasets, so that
the preallocated swap/dump zvols might remain contiguous on the
faster tracks of the drive (i.e. like a dedicated partition, but
with benefits of ZFS checksums and maybe compression)?

Thanks,
//Jim
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