Optical Drive on Ralph

---

1. To use the optical drive on Ralph all you have to do is the following:

• Make sure that you are not in /opt when you issue the initial command to mount the OD. Make sure that /sbin and /usr/local/bin are in your path otherwise you will have to type in /sbin/... before the mount command and /usr/local/bin/... before you type the sudo command. These paths should go in your .profile file.
• This procedure works by letting a regular user run commands as root after giving their own password. The syntax is:

sudo mount /dev/rz9c /opt

2. To unmount the optical drive cd out of /opt then

sudo umount /dev/rz9c /opt

3. How do I format an new 230Mbyte optical disk? This can only be done by a su. DO NOT mount the OD while formatting the disk.

• Erase the current disklabel

 disklabel -z /dev/rrz9a 

• Create a new label for the device (Op 3.5" 230mb disk)

o # disklabel -rw /dev/rrz9a op35dd 

• Read the label back to check above

o disklabel -r /dev/rrz9a

• Put a new file system on the disk; Partition c occupies the whole disk and goes from 0 to 446324

o # newfs /dev/rrz9c 

• Mount the optical disk using the instructions above.