Paddy,

You can simply use mysqldump to backup any 5.1 table, partitioned or otherwise.

Backup:

mysqldump --opt db_name table_name > backup.dump

mysql db_name < backup.dump

Suggesting that you should use Zmanda for this task, without mentioning that the native tool is perfectly adequate, is misleading.

 If you want to promote your specific tool, please say so in the title.

Giuseppe