qemu: could not open disk image /tmp/c.img that was created by qemu

[Juergen Lock]

In article <20080604122407.188217sdanmlq37k at intranet.encontacto.net> you write:
>I'm running amd64 current-8 and am up to date on most everything.
>
>I'm trying to give qemu a try and am using the quick start on the qemu  
>site, step by step and got all the way to the second step ;)
>
># qemu-img create -f qcow c.img 3G
>Formatting 'c.img', fmt=qcow, size=3145728 kB
>
># qemu -cdrom /dev/acd0 -hda /tmp/c.img -m 256 -boot d
>qemu: could not open disk image /tmp/c.img
>
>acd0 was an unmounted windowsXP installation CD.
>
>Should the procedure be changed for FreeBSD, I obviously assumed not?

Hmm, seems the CVE 2008-0928 security patch broke qcow, or at least
new qcow images.  qcow is also deprecated tho, you can just use qcow2
instead which still works.  Or use raw images which should still be
faster, only they are sparse files which some backup software like
bsdtar doesn't know how to deal with properly. (dump still works tho,
as should gtar or star when passed appropriate flags.)

 I just checked, seems that patch also has been backed out from qemu svn
but no replacement committed since.  Hmm...

	Juergen