[Pkg-xen-devel] Bug#674088: Bug#674088: xcp-xapi: vbd-plug to dom0 does not creates /dev/xvd* devices in dom0

[Mike McClurg]

On Wed, May 23, 2012 at 1:35 AM, George Shuklin
<george.shuklin at gmail.com> wrote:
> Package: xcp-xapi
> Version: 1.3.2-6
> Severity: normal
> Tags: upstream
>
> Normally (in 'iso-based' XCP) is possible to attach VDI to dom0.
>
> That operation usually looks like:
>
> xe vbd-create vdi-uuid=... vm-uuid=(dom0 uuid) device=N
> xe vbd-plug
>
> I done those steps in xcp-xapi and got success (no error), but no xvd* device found.
>
> Here operations log:
>
> # xe vbd-create vdi-uuid=c95af56f-799f-49ad-a64f-82eca3299b50 vm-uuid=d859ed1a-760f-9928-b5be-f0ab1790b15f type=Disk mode=RW device=2
> b2e8f7b3-34c4-fe9a-486e-6551b8ba4165
> # xe vbd-plug uuid=b2e8f7b3-34c4-fe9a-486e-6551b8ba4165
> # ls /dev/xv*
> ls: cannot access /dev/xv*: No such file or directory

Hi George,

This is not a bug, but is rather an intended change in behaviour. The
xapi released in Debian right now is a snapshot that is somewhere in
time between XenServer 6.0 and XenServer 6.1 -- this new behaviour
will be standard in XenServer 6.1 (and XCP 1.6).

Try looking for your device in /dev/sm/<sr_uuid>/<vdi_uuid>. If you
need to mount partitions on that device, do 'kpartx -av <device path>'
(and then 'kpartx -dv <device path>' to remove those partitions from
the device mapper).

This is only a change in dom0 behaviour, not domU.

Mike