Subject: Re: Zeroing unused FFS blocks
To: Martti Kuparinen <martti.kuparinen@iki.fi>
From: Luke S. Crawford <lsc@prgmr.com>
List: port-xen
Date: 01/25/2008 13:30:33 
On Fri, 25 Jan 2008, Steven M. Bellovin wrote:
> The easiest thing is to mount the file and copy /dev/zero to some
> filename.  When the disk fills up, delete the file...


exactly;  uh, you should be able to use vnconfig to turn your file into a 
block device so you can mount it from the Dom0.