Re: [Xen-users] which disks/block device does Xen use at the moment?

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Tomasz Chmielewski wrote:
> Nico Kadel-Garcia schrieb:
> > Tomasz Chmielewski wrote:
> > > I'm sending it again, as the message sent on 16.11.2007 didn't get 
> > > to the list.
> > >
> > > Is there a way to guess which block devices / disk does Xen use at 
> > > the moment?
> > > I use Xen with iSCSI.
> > > I connect to 50 iSCSI targets or more on each Xen server - and I get 
> > > "virtual disks" ranging from /dev/sda to /dev/sdbl etc. - it's a lot.
> > > Sometimes, I want to log out a given iSCSI connection (parameters 
> > > changed on a target etc.) - but before I actually do it, I would 
> > > like to know if that iSCSI drive is not used by Xen.
> > > In other word - is there a way to check if Xen uses block device 
> > > /dev/sda, /dev/sdu or /dev/sdbb etc.?
> > Well, what does "mount" say from the DomU
> mount from domU would always say its "local" disk, that is, /dev/sda1 
> or such. And good luck if domU is Windows.
Well, yes. I'm sorry if I was unclear: if you have multiple partitions 
mounted for whatever reason, this gives you a set of references for what 
the "xm list --long" says is available to the domain.
> > and what does "xm list [DOMAIN] --long" say on the Dom0?
> That's it, certainly I can grep through that output, thanks!
Happy to oblige.
> Would be great if Xen registered some "holders" in /sys/block for a 
> device it uses - like LVM or RAID does in /sys/block/<device>/holders/
Hmm. Interesting idea.

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