Although I always run a verify of burned disks I just found an older archive that is unreadable/unrecognizable by any of my optical drives. In an attempt to recover I have tried both "CD Recovery Wizard 2.1" and "EaseUS Data Recovery Wizard 8.8" both of which unfortunately fail to recognize a data disk is inserted into the drive. Should I keep trying additional recovery software or is this an indication it is ultimately unrecoverable?