I replaced an HP T4i 4/8GB tape drive with a Seagate STT22000 10/20GB drive
without first checking its compatibility with BE8.0 and its not on the list.
When I attempt any tape operation using 4/8GB TR-4 tapes, I get the following
error:

Error on HA:0 ID:4 LUN:0 SEAGATE STT20000.
This session has been taken offline. Other sessions can
continue job processing. Most error conditions can be corrected
by unloading and reloading the application. If the session does
not restart, you will need to down and reboot the server.
Vendor: SEAGATE
Product: STT20000
ID:
Firmware: 7A61
Function: Write(5)
Error: Invalid command(7)
Sense Data:
70 00 05 00 - 00 00 00 0a - 00 00 00 00 - 30 00 00 00
00 00 00 00 - 00 00 00 00 - 00 00 00 00 - 00 00 00 00

Is this error due to incompatibility or is there possibly another issue?