Is it possible to have two drives that are mirrored across each other(Raid 1) and a third Hot Spare drive that serves as both a hot spare and contains incremental backups of the data. In other words the third would have a dual purpose of a Hot Spare and a backup. In the case of a drive failure, it would ok if the back up data is erased to mirror the other healthy drive. The end goal would that one could remove and replace the hot spare and then use that old drive as a backup of the data at a previous time. Specifically I am trying to use an Adaptec RAID controller for the RAID 1 configuration and Acronis for the backing up of the data that will be written to the Hot Spare.