zero deleted blocks

[Olivier Smedts]

2012/8/13 Petri Helenius <petri at helenius.fi>:
>
> Hi,
>
> Is it possible to have ZFS or UFS to zero out the deallocated blocks to facilitate VM disk compaction?
>
> Pete

Did you try a classic "dd if=/dev/zero of=a-file-on-the-pool" ? This
won't give good results if you do this on a filesystem with
compression enabled.

-- 
Olivier Smedts                                                 _
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