amtapetype -f /dev/nrsa0 on the PV132T returned the following (took over 48hrs):

Writing 4096 Mbyte   compresseable data:  39 sec
Writing 4096 Mbyte uncompresseable data:  127 sec
WARNING: Tape drive has hardware compression enabled
Estimated time to write 2 * 1024 Mbyte: 63 sec = 0 h 1 min
wrote 5945841 32Kb blocks in 18183 files in 63685 seconds (short write)
wrote 5477126 32Kb blocks in 33602 files in 112491 seconds (short write)

define tapetype unknown-tapetype {
     comment "just produced by tapetype prog (hardware compression on)"
     length 203061 mbytes
     filemark 972 kbytes
     speed 2272 kps
}

Should also have added that this was generated on FreeBSD 4.9

Dell Powervault 132T with hardware compression off:
# amtapetype -f /dev/nst0 -t "IBM-LTO2" -e 200g
Writing 1024 Mbyte   compresseable data:  34 sec
Writing 1024 Mbyte uncompresseable data:  34 sec
Estimated time to write 2 * 204800 Mbyte: 13600 sec = 3 h 46 min
wrote 5636096 32Kb blocks in 86 files in 8002 seconds (short write)
wrote 6029312 32Kb blocks in 184 files in 7942 seconds (short write)
define tapetype IBM-LTO2 {
    comment "just produced by tapetype prog (hardware compression off)"
    length 182272 mbytes
    filemark 0 kbytes
    speed 23416 kps
}