See also Free XenServer Backup System
Back up pool metadata to the default SR:
-c
the first time to create the backup-u <sr-uuid>
to specify the destination SRxe-backup-metadata
Backup pool metadata to a file:
xe pool-dump-database file-name=<filename>
http://docs.vmd.citrix.com/XenServer/5.6.0/1.0/en_gb/installation.html#maintenance-backup-restore
http://support.citrix.com/article/CTX124887 (“Backup and recovery” section)
http://community.citrix.com/display/xs/XenServer+Final+Backup+Script+with+or+without+snapshot
http://community.citrix.com/display/xs/Zero-Downtime+Limited-Space+Backup