Repurposing an Old Tape Library
Rob McNelly walks through customer troubleshooting from an IBM Redbook.

A client was looking to repurpose and virtualize an old TS3200 tape library. The idea was to connect it to a VIO server and then assign it to their IBM i clients.
However, errors came up when running cfgdev:
cfgmgr: 0514-621 WARNING: The following device packages are required for
device support but are not currently installed.
devices.sas.changer
After downloading atape drivers from IBM Fix Central and loading them on the LPAR, the errors went away. An scm0 and some rmt* devices could be seen.
# lsdev -Cc tape
rmt0 Available 06-00-00 IBM 3580 Ultrium Tape Drive (SAS)
rmt1 Available 06-00-00 IBM 3580 Ultrium Tape Drive (SAS)
rmt2 Available 06-00-00 IBM 3580 Ultrium Tape Drive (SAS)
rmt3 Available 06-00-00 IBM 3580 Ultrium Tape Drive (SAS)
smc0 Available 06-00-00 IBM 3573 Library Medium Changer (SAS)