Paul,

You may want to try invoking "mount" normally, rather than mount_cd9660
directly, and specifying "read-only".  For example:

mount -t cd9660 -o ro /dev/cd0a /mounts/foobar

You might also try using cd0d (sometimes that works for me..never really
bothered to look at what BSD thought the problem was).

Finally, you may want to check with "dmesg" to see if there were any SCSI
timeouts (that indicate, for example, a termination problem).  I had
numerous SCSI "issues" when using my two 624's with an NCR810 controller on
i386...it all went away when I put an active terminator on the bus.

    ScottE

----- Original Message -----
From: "Paul Apprich" <paul.apprich@verizon.net>
To: <port-i386@netbsd.org>
Sent: Monday, April 22, 2002 1:51 PM
Subject: Piopneer DRM624X cd-rom


>
>
>     I have a Pioneer DRM624X connected to a Compaq Deskpro 466 through a
> BusLogic BT747 SCSI host. Dmesg shows individual cdN (cd0-cd5) for all
> discs in the magazine (6). However, upon' mount_cd9660 /dev/cd0a' or
> 'cat /dev/rcd0a | hexdump -C' the response is "Operation not supported
> by device"
>
> Paul Apprich
>
>
>