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Mounting an Optical Disk


Mounting an Optical Disk

I have been tasked with mounting an optical disk on a VAX Alpha system.

At least I have successfully mounted a CD and ran an installation. (but I new ahead of time what was on the CD -- this is not the case with the Optical Disk.

I did not see much on this in either the Vax admin manual or the user's manual.

It is a VAX Alpha OpenVMS

When I type:

$ show device d

I get a list of the devices and from experience I recognize which one is the hard drive and which one is the CD Drive. How do I determine which one is the Optical Disk Drive?

This imformation is not apparent from:

$ help mount


The Mount utility (MOUNT) makes a disk or magnetic tape volume
available for processing.


MOUNT device-name[:][,...] [volume-label[,...]]


Also, once I have mounted the drive. I suppose it will be easy to just set def to that logical name and browse the contents of the Optical Drive?
John Gillings
Honored Contributor

Re: Mounting an Optical Disk


>How do I determine which one is the Optical Disk Drive?

I may not be undestanding exactly what you mean by "Optical Disk Drive".


should give you a verbose listing of all devices with names starting with "D". That should include the device type in the first line.

If it's connected via SCSI, it will probably be called "DKcnnn" - where "c" is a controller letter A,B,C etc... and "nnn" is the SCSI unit ID *100. For example something like "DKA400". First SCSI controller, unit 4.

Also note that SHOW DEV D (without /FULL) shows the device status. Typically "Mounted" or "Online". Your hard drives will probably all be "Mounted". CD and Optical drives without discs in them will be "Online".

The easiest way to Mount an unknown volume is MOUNT/OVER=ID DKcnnn

This will mount the volume privately, and will show the volume label. If you need the volume mounted for all users, then note the label, immediately dismount it then:

$ MOUNT/SYSTEM DKcnnn label

From there on you can treat it like any other disk. You don't need to set default, just:

$ DIRECTORY DKcnnn:[000000]

If this doesn't help, please post the output of SHOW DEVICE
A crucible of informative mistakes

Re: Mounting an Optical Disk

The full output to show devices is long so I posted it here: http://www.gelsana.com/show%20devices.htm
Robert Gezelter
Honored Contributor

Re: Mounting an Optical Disk


I believe that your optical disk is an RWZ53 located at AS800$DKA500.

How was the data on the drive written?

- Bob Gezelter, http://www.rlgsc.com
Robert Gezelter
Honored Contributor

Re: Mounting an Optical Disk


If the data was written in FILES-11, you should be able to do a $ MOUNT/OVERRIDE=ID/NOWRITE DKA500

- Bob Gezelter, http://www.rlgsc.com