[LUNI] Mouning Xen Disk Images

[Jeff Gutierrez]

Hey guys,



I'm trying to mount the partitions in a disk image primarily used by a
Xen VM. The disk image was created by virt-install under CentOS 5.0.
The issue is that the disk image has 2 partitions one boot and another
an LVM. The partitions I need to access are in the LVM. This is where I
hit a brick wall. 



# /sbin/fdisk -lu luna.img


last_lba(): I don't know how to handle files with mode 81ed


You must set cylinders.


You can do this from the extra functions menu.





Disk luna.img: 0 MB, 0 bytes


255 heads, 63 sectors/track, 0 cylinders, total 0 sectors


Units = sectors of 1 * 512 = 512 bytes





   Device Boot      Start         End      Blocks   Id  System


luna.img1   *          63      208844      104391   83  Linux


luna.img2          208845    16771859     8281507+  8e  Linux LVM


Partition 2 has different physical/logical endings:


     phys=(1023, 254, 63) logical=(1043, 254, 63)




I can easily mount the first partition using `mount` and passing it the
offset. But I'm unable to do so for the partitions in the LVM. (The LVM
volume has a swap partition and a root partition.)



1. Does anybody know how I can access the partitions in the LVM? 

2. Is it advisable to use LVM in a disk image used by Xen? Would I be better of if I didn't use LVM? 



I'd appreciate any information.



Regards,



Jeff