Creating a LVM backed XFS SR
LVM backed XFS SR Ive created a Logical Volume under Kubuntu 11.10 with XFS and Kronos installed The following is what was required:
install lvm2 and xfstools
"apt-get install lvm2 xfstools"
create a logical volume
(If you need help in doing this, there are many tutorials for LVM on the net) ( see  )
Then you must copy the XFSSR.py
"cp XFSSR.py /usr/lib/xcp/sm/"
create a symlink to XFSSR
"ln -s XFSSR.py XFSSR"
once the logical volume is created restart xapi
"service xcp-xapi restart"
to create the SR, run
"SR=`xe sr-create type=xfs device-config:device=/dev/mapper/test-builder name-label=xfs`"
change '/dev/mapper/test-builder' to your lvm device to match your system
after its done, youll be able to use the XFS LVM filesystem as the default SR