Technical data

Using BACKUP
11.8 Using Disks and Tapes
• If a save set will be written in sequential-disk format (for example, if the
save set occupies more than one disk), the target disk must be mounted as
a foreign device by specifying the command qualifier /FOREIGN to the DCL
command MOUNT.
How to Perform This Task
1. Enter the SHOW DEVICES command in the following format to check
whether the device is already mounted:
SHOW DEVICES device-name
2. Enter the MOUNT command in the following format:
MOUNT [/FOREIGN] device-name [volume-label] [logical-name]
where:
device-name is the name of the drive that holds the volume you want to
mount.
volume-label is the alphanumeric identification you assigned to the volume
with the INITIALIZE command. For disk volumes, labels can
have a maximum of 12 characters; for magnetic tape volumes,
labels can have a maximum of 6 characters. You do not need
to add this parameter if you are mounting the volume with the
/FOREIGN qualifier.
logical-name is an optional 1- to 255-character alphanumeric specification
that you want to associate with the volume.
Example
$ SHOW DEVICE MU
Device Device Error Volume Free Trans Mnt
Name Status Count Label Blocks Count Cnt
DAD$MUA6: Online 0
MOM$MUA6: Online 0
FRED$MUA6: Online 0
$ MOUNT/FOREIGN FRED$MUA6: TEST DRIVE1
%MOUNT-I-MOUNTED, TEST mounted on _FRED$MUA6:
This command mounts the tape in FRED$MUA6: and assigns it the logical name
DRIVE1.
11.8.3 Dismounting a Volume
BACKUP does not dismount the last volume of a backup operation (unless you
use the /RELEASE_TAPE qualifier). When you finish using a volume, you should
dismount it.
How to Perform This Task
Enter the DISMOUNT command in the following format:
DISMOUNT device-name
Example
The following command dismounts a tape in drive MUB6:
$ DISMOUNT MUB6:
This command dismounts and unloads the tape in MUB6. After you dismount
and unload the volume, you can remove it from the drive. To dismount the tape
but not unload it, enter the following command:
$ DISMOUNT/NOUNLOAD MUB6:
Using BACKUP 11–17