Re: [Xen-users] how to find the underlying device of an block-attached device

[vu pham <vu@xxxxxxxxxx>]

Todd Deshane wrote:
> On Wed, Jan 14, 2009 at 4:44 PM, vu pham <vu@xxxxxxxxxx> wrote:
> > I added several files as block devices to a domU. Now I am trying to list
> > which files I used for the attached devices.
> > xm block-list does not return the file names.
> >
> > [root@xen2 xen]#  xm block-list vtest5
> > Vdev  BE handle state evt-ch ring-ref BE-path
> > 51712    0    0     4      6      8     /local/domain/0/backend/tap/2/51712
> > 51728    0    0     4      7      9     /local/domain/0/backend/tap/2/51728
> > 51744    0    0     4      9      786   /local/domain/0/backend/tap/2/51744
> > 51760    0    0     4      10     885   /local/domain/0/backend/tap/2/51760
> > 51776    0    0     4      11     850   /local/domain/0/backend/tap/2/51776
> > 51792    0    0     4      12     1004  /local/domain/0/backend/tap/2/51792
> >
> > Where can I find those information ?
> Does the lsof command help here?
I was not very clear in my qeustion, I guess. For example, I have the 
following commands in dom0:
 #xm block-attach vtest5 tap:aio://xen/images/vtest5_c.img /dev/xvdc w
 #xm block-attach vtest5 tap:aio://xen/images/vtest5_d.img /dev/xvdd w
 #xm block-attach vtest5 tap:aio://xen/images/vtest5_e.img /dev/xvde w
 #xm block-attach vtest5 tap:aio://xen/images/vtest5_f.img /dev/xvdf w

Later, I would like to check which files ( in dom0 ) are corresponding 
to which devices ( in domU vtest5 ).
I tried lsof but I cannot fint the connection between the two.

Thanks,

Vu


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