RE: [Xen-devel] maximum size of a block device in a domU

["Jayaraman, Bhaskar" <Bhaskar.Jayaraman@xxxxxxx>]

Hi, if I were using Xen 3.2.1 and above and if I were to direct assign a block 
device to a HVM guest will I still play by the rules mentioned below for 
maximum size of the device?
Regards,
Bhaskar.

-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Sebastian Reitenbach
Sent: Monday, July 21, 2008 5:00 PM
To: samuel.thibault@xxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] maximum size of a block device in a domU

Hi Samuel,

Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx> wrote:
> Sebastian Reitenbach, le Mon 21 Jul 2008 12:48:51 +0200, a écrit :
> > I'm looking for an answer to my question that I have since days, but not
> > found an answer yet.
> > I am looking for the maximum size a block device, like a harddisk can
have?
> > AFAIK, on vmware, there is a limit at 2TB for block devices of being
usable?
> > I was already asking on the users list, and searched the archives, but
did
> > not found a sufficient answer yet, therefore I hope one of the developer
> > will let me know.
>
> For HVM domU, since qemu supports lba48, the maximum should be 2^57B
> there, not tested though :) The actual limit is then the size that dom0
> itself can cope with.
>
> For PV domU, the PV interface is 64bit, so theorically 2^73B...  Then
> it's up to limitations of dom0 and domU themselves.

Thanks a lot for the fast and informative answer.

Sebastian


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