vax, cdroms, etc

From: CLASSICCMP_at_trailing-edge.com <(CLASSICCMP_at_trailing-edge.com)>
Date: Wed Mar 10 12:54:00 1999

>1. Does VMS 6.2 know about ISO9660 cdroms out of the box?

You know, there is a handy VMS command called HELP:

TIMVAX $HELP MOUNT MOUNT_EXAMPLES

MOUNT

  MOUNT_Examples

       The following examples describe how to use the Mount utility with
       and without operator assistance.

       For examples 1 and 2, operator assistance is not required,
       assuming the volumes are in the drives. Examples 3 to 6 describe
       operator-assisted mounts. Examples 7 and 8 describe mounting ISO
       9660 CD-ROM volume sets, example 9 makes subsystems on a volume
       accessible, and example 10 demonstrates mounting a shadow set.

[...]

       7.$ MOUNT/SYSTEM/MEDIA=CDROM $1$DKA1 USER
         %MOUNT-I-CDROM_ISO, USER:VMS_ONLINE_DOCUMENTATION (1 of 4) ,
         mounted on _$1$DKA1: (CDROM)

         $ MOUNT/SYSTEM/MEDIA=CDROM $1$DKA2 PROGRAMMING_1
         %MOUNT-I-CDROM_ISO, PROGRAMMING_1:VMS_ONLINE_DOCUMENTATION (2 of 4) ,
         mounted on _$1$DKA2: (CDROM)

         $ MOUNT/SYSTEM/MEDIA=CDROM $1$DKA3 PROGRAMMING_2
         %MOUNT-I-CDROM_ISO, PROGRAMMING_2:VMS_ONLINE_DOCUMENTATION (3 of 4) ,
         mounted on _$1$DKA3: (CDROM)

         MOUNT/SYSTEM/MEDIA=CDROM $1$DKA4 MANAGEMENT
         %MOUNT-I-CDROM_ISO, MANAGEMENT:VMS_ONLINE_DOCUMENTATION (4 of 4) ,
         mounted on _$1$DKA4: (CDROM)

       These commands mount each member of a four-member ISO 9660 volume
       set whose volume-set name is VMS_ONLINE_DOCUMENTATION.

       8.$ MOUNT/SYSTEM/MEDIA=CDROM $1$DKA1,$1$DKA2,$1$DKA3,$1$DKA4
         USER,PROGRAMMING_1,PROGRAMMING_2,MANAGEMENT
         %MOUNT-I-CDROM_ISO, USER:VMS_ONLINE_DOCUMENTATION (1 of 4) , mounted on
         _$1$DKA1: (CDROM)
         %MOUNT-I-CDROM_ISO, PROGRAMMING_1:VMS_ONLINE_DOCUMENTATION (2 of 4) ,
         mounted on _$1$DKA2: (CDROM)
         %MOUNT-I-CDROM_ISO, PROGRAMMING_2:VMS_ONLINE_DOCUMENTATION (3 of 4) ,
         mounted on _$1$DKA3: (CDROM)
         %MOUNT-I-CDROM_ISO, MANAGEMENT:VMS_ONLINE_DOCUMENTATION (4 of 4) ,
         mounted on _$1$DKA4: (CDROM)

       This command mounts four members of an ISO 9660 volume set whose
       volume set name is VMS_ONLINE_DOCUMENTATION.


>2. When doing a show dev on a VS3100/40, the cdrom drive should show
> up on the device list, right? (I suspect I goofed up the wiring on the
> CDROM case)

Yes, it should, as a "RO" (Read Only) device.

One potential gotcha - your 3100 most likely has the host adapter at ID#6.
So the CD-ROM obviously has to have a different ID.

>3. can someone answer conclusively for me whether the vaxstation expects
> the disk to have parity enabled? The lists I've read don't seem very
> sure.

It absolutely expects parity, though most drives will generate parity on output
and ignore it on input if jumpered for no parity. It also prefers drives that
can be jumpered for 512 bytes/sector (though in some cases it will succesfully
do a MODE SELECT to override a 2048 byte/sector setting.).

-- 
 Tim Shoppa                        Email: shoppa_at_trailing-edge.com
 Trailing Edge Technology          WWW:   http://www.trailing-edge.com/
 7328 Bradley Blvd		   Voice: 301-767-5917
 Bethesda, MD, USA 20817           Fax:   301-767-5927
Received on Wed Mar 10 1999 - 12:54:00 GMT

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