bcwipe doesn't wipe any block device

[Thomas Vogt]

Hello

Has someone ever tried to wipe a block device on freebsd 6.2 with
bcwipe?

I tried
bcwipe -bvmd /dev/aacd1

I get:
Writing to /dev/aacd1: Invalid argument
I tried slices too but it i got the same error.

dd can overwrite my disk several times but perhaps someone can give me a
hint how to wipe a disk with bcwipe.

Regards,
Thomas
-- 
Terry Lambert:
"It is not unix's job to stop you from shooting your foot. If you so
choose to do so, then it is UNIX's job to deliver Mr. Bullet to Mr Foot
in the most efficient way it knows."