To add a drive to a multi-drive system

For multi-drive systems, archives are written across all available drives. It is important to keep this in mind when defining your archive strategy. If your archive set grows and you need to use additional drives, do one of the following:

     Add one or more new drives to the existing set and prepare them as described in To prepare archive media. Preparing the drives creates a new logical volume but purges all data from the original drives. For example, you had been archiving to two drives. You add a third drive and prepare it. Subsequent archives are written across all three drives, but older archives that had been stored on the original two drives were deleted during the prepare operation.

     Remove existing drives to retain archived data, then insert a new set of drives and prepare. For details, see To remove archive drives for off-site storage and To prepare archive media.