The CLI must be used to backup the pool database. To obtain a consistent pool metadata backup file, run xe pool-dump-database against the host and archive the resulting file. The backup file will contain sensitive authentication information about the pool, so ensure it is securely stored.

Example: xe pool-dump-database file-name=/backup/poolbackfile

To restore the pool metadata, use the xe pool-restore-database from a previous dump file. If your XenServer host has died completely then you must first do a fresh install, and then run the xe pool-restore-database command against the freshly installed host.

After a restoration of metadata, some VMs may still be registered as being “suspended”, but the Storage Repository with the suspended metadata is no longer available since the host has been reinstalled. To reset these VMs back to the halted state so that they can be started up again, use the xe vm-reset-powerstate command.

You will have to securely store  file in a safe place rather than keeping in the same XenServer. The following steps shows how to mount Windows share in XenServer;

[root@xensvr01 ~]#mount -t cifs // /mnt/backup -o username=bawin,password=xJv&kt5CR,domain=shareitskills

Copy the file to mounted drive;

[root@xensvr01 ~]#cp /root/poolbackfile /mnt/backup/poolbackfile