how can i test my tape throughput in Mb/sec?

Is there a tool or cmd line program i can use to test my tape throughput in Mb/sec?

thank you

On my linux box "hdparm" works for HDD

[root@ba-dev-ind ~]# hdparm -t /dev/hdc

/dev/hdc:
Timing buffered disk reads: 58 MB in 3.08 seconds = 18.84 MB/sec
[root@ba-dev-ind ~]# hdparm -T /dev/hdc

/dev/hdc:
Timing cached reads: 416 MB in 2.01 seconds = 206.59 MB/sec

http://directory.fsf.org/sysadmin/conf/hdparm.html

On FreeBSD check iostat or some app from /usr/ports/benchmarks.