On 11/12/2007, Ross S. W. Walker rwalker@medallion.com wrote:
Johnny Tan wrote:
Amos Shapira wrote:
When I needed to build Xen guests under Debian I could
follow more or
less the instructions in http://preview.tinyurl.com/2oc48r and the advantage of this approach is that it allows me to setup
the Xen guest
directly on the LVM partition without making it consider the LVM partition as an entire disk with a partition table.
I might be missing something, but that link seems to talk about FAI and doesn't mention xen. I'm interested in seeing how it can install on the LVM partition but the OS doesn't see it as an entire disk with a partition table. What does "fdisk -l" show, then?
Here is a good link: http://wiki.rpath.com/wiki/Xen_DomU_Guide
The Xen domU or HVM will treat the partition as a whole disk, so that means MBR and stuff, but you can mount it on dom0 as such:
# fdisk -l -u /dev/es_storage/exch_data.1
Disk /dev/es_storage/exch_data.1: 218.2 GB, 218233831424 bytes 255 heads, 63 sectors/track, 26532 cylinders, total 426237952 sectors Units = sectors of 1 * 512 = 512 bytes
Device Boot Start End Blocks Id System/dev/es_storage/exch_data.1p1 128 426220514 213110193+ 7 HPFS/NTFS
# mount -t ntfs -o loop,offset=128 /dev/es_storage/exch_data.1 /mnt
That will create an auto-loop mount of the partition at sector offset 128.
Yes I'm familiar with that trick (including your correction below, though I usually use explicit losetup) but it still: 1. Isn't as easy and safe as a direct "mount" 2. There is still some overhead of having LVM-over-LVM.
Thanks,
--Amos