hi,
your OS only see tape drive, if you have SAN check the zone, looks like someting is bad in your configuration.
need to show someting like Bob said:(this is robot)
Exch HP:1x8 G2 AUTOLDR Path: "/dev/rac/c0t4d1" SN: "MXA94210HN"
Description: HP StorageWorks 1x8 Cartridge Autoloader
Revision: 2.80 Flags: 0x0006 Slots: 7 Drives: 1
Drive(s) SN:
"HU10938F7R"
Regards