Date: Mon, 13 Aug 2012 11:27:51 +0200 From: Olivier Smedts <olivier@gid0.org> To: Petri Helenius <petri@helenius.fi> Cc: freebsd-fs@freebsd.org Subject: Re: zero deleted blocks Message-ID: <CABzXLYN%2BYPeuf_-kC1UHPQRVWy-98OQs7M39EGfiyCaOj7fgQw@mail.gmail.com> In-Reply-To: <7BDA02A3-99ED-4F67-9B2D-5AAF1523642E@helenius.fi> References: <7BDA02A3-99ED-4F67-9B2D-5AAF1523642E@helenius.fi>
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2012/8/13 Petri Helenius <petri@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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