First you have to see what you have look for fiber cards and tape drives etc
you may also need to install drivers for this device on to your AIX system
lsdev 0r lsdev -Cc tape
you may also use lscfg -vp and have a
Here are some things you may want to ask your self first
Is there a driver disk that go's with AIX ?
Are you using FIBER ?
Do you use a fiber switch ?
Have you zoned them ?
how hve you connected tthis all togeter ?
what backup software will you use ?
Have you installed the Atape driver needed for LTO tape drive support on AIX?
lslpp -hac | grep -i atape
should find it.
Even without the driver I would expect AIX to configure the drive as "other scsi tape drive" or something similar.
The tape device will be rmt0 not mrt0 as shown in your last post.
Have you terminated the scsi bus correctly?
What does '# lscfg -vp l grep -i -p rmt' and '# lsdev -Cc tape' show?
"Device Type: ssa-scsi-2" will be an SSA adapter. Ignore that.
Which of the three scsi interfaces is it connected to?
I presume scsi1 has the disks so it would be scsi0 in the pci slot 6 or the other onboard adapter scsi2.
As well as checking for the Atape fileset / driver please post the output of the following:
lscfg -vp l grep -i -p rmt
lsdev -Cs scsi
lsdev -Cc disk
lsdev -Cc tape