This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] Questions on qcow, qcow2 versus LVM

On Tue, Dec 29, 2009 at 11:56 PM, Matthew Law <matt@xxxxxxxxxxxxxxxxxx> wrote:
> I've just done some tests on this and you are absolutely right: with no
> partitions it works fine, so either parted, kpartx or whatever is causing
> the problem.  Now my problem is that I can't run a partitionless volume
> because I absolutely need to use pvgrub and that doesn't seem to work

Yes, that seems to be the case (at least with 3.4.1)

> without a proper partition table in place or I have screwed up somewhere?

You might be able to compile xen-unstable and take its pvgrub. Should work.

Another way to is to investigate why your earlier setup has problems.
To eliminate partition problems, you can map the disk to dom0  like

modprobe xenblk
xm block-attach 0 phy:/dev/vg_name/lv_name xvda w
### do your stuff here. fdisk xvda, mkfs, ta, whatever. Use fdisk
instead of parted.
### don't forget to umount afterwards
xm block-list 0
xm block-detach 0 51712 <== 51712 is the devid for xvda

If that works, then it's 100% confirmed the problem is with
parted/kpartx. Repeat the test, but this time using parted instead of
fdisk, and you get the idea :D


Xen-users mailing list