Thanks to Dr. Thomas Blinn and Rich Glazier for helping out on this one.
The question was:
>    Can anyone tell me where these (null) cdrom and tape devices come
>from?
>
>   56:  11       xxx      cdrom     none    0      1    (null)
>   57:  4        xxx      tape      none    0      1    tape0  [0/5/0]
>   58:  5        xxx      tape      none    0      1    (null)
>   60:  12       xxx      cdrom     none    0      1    cdrom1 [3/5/0]
>   61:  13       xxx      tape      none    0      1    tape2  [0/6/0]
>
I never did quite figure out where they came from, as they were there after
the initial installation, but now I know how to get rid of them.  Suppose,
in the above example, I wanted to have cdrom0 the correct device and get rid
of that cdrom1 ( I only have one CDrom on this box, honest ).
# hwmgr del scsi -id 56, in this case, gets rid of that null cdrom device
Now I want to have cdrom0 correct, so I do:
# dsfmgr -m cdrom1 cdrom0
If I had blown away the cdrom1 device as well, a hwmgr scan scsi would have
brought it back as cdrom2.  Then I could have done 
# dsfmgr -m cdrom2 cdrom0
-D
Denise McCracken
MiSys Healthcare Systems
Denise.McCracken_at_misyshealthcare.com
(520) 570-2521
Received on Sat Jan 04 2003 - 00:28:31 NZDT