Re: dd vs. truncate for creating vkernel root images

["Nuno Antunes" <nuno.antunes@xxxxxxxxx>]

On 4/12/07, Justin C. Sherrill <justin@shiningsilence.com> wrote:
> On Wed, April 11, 2007 6:00 pm, Nuno Antunes wrote:
> > Hi all,
> >
> > Is there any advantage in using
> > 'dd if=/dev/zero of=/var/vkernel/rootimg.01 bs=1m count=2048'
> > over the much quicker
> > 'truncate -s 2G /var/vkernel/rootimg.01'
> > other than getting a root image filled with zeros?
>
> Have you tried it?  What happened?

Yes I have, and it works. Vkernels can use a root image created this
way. So does it mean that the file will grow on demand (up to the
established size, of course)?

Thanks,
Nuno