[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-users] xm block-attach from dom0 and exception looking up device number for /dev/xvda1 - why ?

  • To: "Ian Brown" <ianbrn@xxxxxxxxx>
  • From: "trilok nuwal" <tc.nuwal@xxxxxxxxx>
  • Date: Fri, 13 Apr 2007 11:59:49 +0530
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 12 Apr 2007 23:28:40 -0700
  • Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=pXUx/9jrnzvx6einyy09J4j7mH8tYuuLY+8KC8H0kLUOzVg7PHUq/Qvc4aoMUXivYHgiOJZSGmGF2c5igLUAh0b5MVzEjU5zhClpdOGQSTZ9O/Q453FNNc6RPq1ey8E/jC6slz9hN5tzm31l2/NkrSYiZ7307gVLjmB7NBqkPSs=
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

On 4/11/07, Ian Brown <ianbrn@xxxxxxxxx> wrote:

I am trying to perform "xm block-attach" from dom0 according to the
Xen blktap README.

What I am trying to do is :

xm block-attach 0 tap:aio:/var/lib/xen/images/guest2/guest2File /dev/xvda1 w 0

I am doubtful if  this works to dom0, this should be used with other domains. Why u need this device in dom0 . Everything is available to dom0.

whereas "/var/lib/xen/images/guest2/guest2File" is the image which appears
in the domU cofig file:
disk = [ 'tap:aio:/var/lib/xen/images/guest2/guest2File,xvda,w', ...]

I see the following error message in /var/log/xen/xend.log: (of dom0
of course)

[2007-04-11 10:51:24 xend 3123] DEBUG (blkif:24) exception
looking up device number for /dev/xvda1:
[Errno 2] No such file or directory: '/dev/xvda1'

Indeed, ls -al /dev/xvda1 in dom0 gives:
  ls: /dev/xvda1: No such file or directory
and also  running "cat /proc/partitions |grep xvd" from dom0
gives nothing.

I want to add that tring mounting from dom0 onto domU succeeds:
xm block-attach 1 tap:aio:/var/lib/xen/images/guest2/guest2File /dev/xvda1 w
(where 1 is the number of domU).
Also mounting /dev/xvda1 from domU succeeds.

Any idea ? what should I do so that it will succeed ? is this readme
not valid anynmore ??


Xen-users mailing list

Xen-users mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.