On Fri, Apr 01, 2005 at 10:02:00AM +0000, juan@xtraeme.nopcode.org wrote:
> >Number:         29856
> >Category:       port-xen
> >Synopsis:       Cannot add vnd files in domU when it's already running
> >Confidential:   no
> >Severity:       serious
> >Priority:       medium
> >Responsible:    port-xen-maintainer
> >State:          open
> >Class:          sw-bug
> >Submitter-Id:   net
> >Arrival-Date:   Fri Apr 01 10:02:00 +0000 2005
> >Originator:     Juan RP
> >Release:        NetBSD 3.99.2
> >Organization:
> >Environment:
> System: NetBSD Mandylion 3.99.2 NetBSD 3.99.2 (GATEWAY_) #1: Thu Mar 31 18:41:13 CEST 2005 juan@Nocturno:/home/juan/build/obj/sys/arch/i386/compile/GATEWAY_ i386
> Architecture: i386
> Machine: i386
> >Description:
> 
> 	When there's a domU running, you might want to add
> 	another vbd device, but it doesn't work:
> 
> 	dom0:
> 
> 	$ xm create /etc/xen/foo 
> 	$ dd if=/dev/zero of=mydisk.img count=512 bs=1m
> 	$ vnconfig vnd0 mydisk.img
> 	$ xm vbd-create nbsd1 phy:/dev/vnd0a wd1d w

You should use vnd0d, not vnd0a. Either use the raw partition, or a partition
not starting at offset 0. The first sectors of the vnd device are read-only
for normal partitions, to protect the disklabel.

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--