brbackup to multiple disks for a different reason

I am currently doing compressed backups to a single disk (actually a NFS mount).

The bottle neck is the compression program, and that it is single threaded. Only

one of my CPUs is being used.

What I would like to do is compress multiple files at a time but still to the same

location.

Can one give the same 'disk' mutilple times for backup_root_dir ?

something like brbackup_root_dir=(/backup, /backup, /backup) and then

set exec_parallel to say 3 ?

-pete