dd vs. truncate for creating vkernel root images

[Nuno Antunes]

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?
Thanks,
Nuno