Re: [win-pv-devel] Identifying PV disk devices

[Owen Smith <owen.smith@xxxxxxxxxx>]

LocationInformation indicates the TargetId as the middle 2 characters. 
The xenstore backend device ID contains a formatted variant of this, as it 
encodes
additional information (see xenvbd/fdo.c __ParseVbd() @426)

The Page 83 data will append the vdi-uuid to any other data (from xenstore or 
synthesized) as a vendor specific ascii field.

> -----Original Message-----
> From: win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx [mailto:win-pv-devel-
> bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Paul Durrant
> Sent: 13 July 2015 16:24
> To: RafaÅ WojdyÅa; win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> Subject: Re: [win-pv-devel] Identifying PV disk devices
> 
> > -----Original Message-----
> > From: win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx [mailto:win-pv-devel-
> > bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Rafal Wojdyla
> > Sent: 13 July 2015 16:16
> > To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> > Subject: [win-pv-devel] Identifying PV disk devices
> >
> > Hi,
> >
> > Is it possible to obtain the backend device ID for a particular PV
> > disk from user mode? Currently it's hard to identify which disk is
> > which if there are multiple disks attached. The only difference in
> > device properties I found is location, but maybe there is an easier way?
> >
> 
> What do you mean by device id? The location is pretty much the main
> distinguishing feature. The driver is capable of taking page 80 and 83 data
> from xenstore if the toolstack puts something there, but xl doesn't do that
> AFAIK.
> 
>   Paul
> 
> > --
> > RafaÅ WojdyÅa
> > Qubes Tools for Windows developer
> > https://www.qubes-os.org/
> >
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