I tried to configure cgd on a wedge under NetBSD 4 (RC1 / i386)
and got an error

    # cgdconfig -v -V re-enter cgd1 /dev/dk6 /mfs/wd0l
        with alg blowfish-cbc keylen 288 blocksize -1 ivmethod encblkno
    ioctl: Inappropriate ioctl for device
    #

  Has anyone done this successfully?

  Some web searching suggested that cgd on wedges is in fact
supported (since 2005).  Did I misconstrue this or did I just maybe
do something wrong in the configuration?

Thanks,  --Dave