mounting scsi tape drive

[junk]

I am having a problem mounting a scsi tape drive.
The kernel sees it , but it wont mount.

>From dmesg:

sa0 at ahc0 bus 0 target 5 lun 0
sa0: <CONNER CTT8000-S 1.17> Removable Sequential Access SCSI-2 device
sa0: 5.000MB/s transfers (5.000MHz, offset 15)

When i try to mount it:

[root at cpr]/dev(184): mount /dev/sa0 /mnt/tape/
mount: /dev/sa0: Block device required

even tried:
[root at cpr]/dev(185): mount /dev/nsa0 /mnt/tape/
mount: /dev/nsa0: Block device required

[root at cpr]/dev(186): mt rewind
mt: /dev/nsa0: Invalid argument

Can someone please help with this?
Thanks