Comment # 5 on bug 900398 from Oliver M�ssinger

Leap ISOs also not work:

Starting VM 'opensuse421_klein'
Internal error: xenopsd internal error: VM =
4bc86c0d-ca20-6ac1-400c-f1b5ae88498f; domid = 8; Bootloader.Bad_error Traceback
(most recent call last):
  File "/usr/bin/pygrub", line 936, in ?
    fs = fsimage.open(file, part_offs[0], bootfsoptions)
IOError: [Errno 95] Operation not supported

[root@xensrv1 ~]# lsb_release -a
LSB Version:    :core-4.0-amd64:core-4.0-noarch
Distributor ID: XenServer
Description:    XenServer release 6.5.0-90233c (xenenterprise)
Release:        6.5.0-90233c
Codename:       xenenterprise

[root@xensrv1 ~]# find /usr/ -name "fsimage*"
/usr/lib64/fs/fat/fsimage.so
/usr/lib64/fs/xfs/fsimage.so
/usr/lib64/fs/ufs/fsimage.so
/usr/lib64/fs/iso9660/fsimage.so
/usr/lib64/fs/reiserfs/fsimage.so
/usr/lib64/fs/ext2fs-lib/fsimage.so
/usr/lib64/fs/zfs/fsimage.so
/usr/lib64/python2.4/site-packages/fsimage.so

At xenServer 6.5.0 with all patches, there is no fsimage.so for btrfs.