Magnetic optical (MO) drives are usually attached to a SCSI or EIDE (ATA) bus.
Before you attempt to use the drive, ensure that the hardware is set up correctly and that the BIOS detects the hardware properly.
The driver that you need depends on whether the drive is attached to a SCSI or EIDE interface. If it's SCSI, you'll need to determine the proper driver for your SCSI interface. If it's EIDE, simply use the devb-eide driver. For more information, see "Hard disks," above.
The drivers for optical disks load the cam-optical.so shared object, which provides a common access method for optical disks.
The MO drive should appear in your /dev directory as /dev/mox, where x is the number of the drive, starting at 0.
To mount the drive, type:
mount /dev/mo0 /fs/mo_drive
You don't need to remount the drive when you change disks.