I have a MCA640 magneto opitcal drive I am trying to use with my IPX.
I have netbsd1.3_alpha installed
sd1 is the correct id for the drive
I have tried the following commands, and written the results following
them
        Thanks for any help
            John

>disklabel -r /dev/sd1
sd1: no disk label

>disklabel -R /dev/sd1 MCA  (MCA is included at the bottom)
sd1: no disk label
disklabel: warning, unused partition c: size 310352 offset 0
disklabel: ioctl DIOCWDINFO: Label magic number or checksum is wrong!
(disklabel or kernel is out of date?)

>ls -la /sbin/disklabel
-r-xr-xr-x    1 bin    bin    139264    Nov    3 14:40 /sbin/disklabel

>ls -la /netbsd
-rwxr-xr-x    1 root    root    1661832 Oct 30 17:49 /netbsd

>dd if=/dev/zero of=/dev/rsd1c
it returned:
sd1: no disk label
dd: /dev/rsd1c: invalid arguement
1+0 records in
0+0 records out
0 bytes transferred in 1 sec (0 bytes/sec)

MCA:
# /dev/rsd1c
type: SCSI
disk: SCSI disk
label: optical
flags:
bytes/sector: 2048
sectors/track: 64
tracks/cylinder: 8
sectors/cylinder: 512
cylinders: 606
total sectors: 310352
rpm: 3600
interleave: 1
trakskew: 0
cylinderskew: 0
headswitch: 0    #milliseconds
track-to-track seek: 0    #milliseconds
drivedata: 0

2 partitions:
#    size    offset    fstype    [fsize bsize    cpg]
    a: 310352    0    4.2BSD    0    0    0
    c: 310352    0    unknown