DSM/Tape Catalog Operator Interface (MEDIACOM) Manual

MEDIACOM Commands
DSM/Tape Catalog Operator Interface (MEDIACOM) Manual—429828-010
2-67
ALTER TAPEMOUNT Command
(Super Group Only)
1. Create more TMF scratch tapes.
2. Mount one of the new tapes to satisfy the mount message.
Examples

You need to recover some payroll files from the latest generation of payroll backup
tapes which is generation 12. This table shows the cataloged tapes for that
generation, which are two identical tape sets created by a parallel BACKUP run:
Use this RECOVER DISKFILE command:
MC> RECOVER DISKFILE $PAY.PAYAP.*,&
>>> TAPEFILE PAYROLL_BACKUP,&
>>> OUT OUTREP
The tape message you see for the input file is:
... $ZSVR : 0017 *MC* MOUNT X00030 ON $T005
You mount tape X00030, and RECOVER DISKFILE begins copying files from that
tape to disk. Eventually, you see this mount message:
... $ZSVR : 0025 *MC* MOUNT X00031 ON $T005
You cannot find tape X00031, so you use ALTER TAPEMOUNT to have a
replacement scratch tape chosen by DSM/TC:
MC> ALTER TAPEMOUNT 25
Because there is a parallel copy that is interchangeable tape to tape, DSM/TC
selects X00034 as the substitute tape. This message appears:
... $ZSVR : 0025 *MC* MOUNT X00034 ON $T005
Processing continues. Finally, the third tape is required by RECOVER DISKFILE.
This message appears:
... $ZSVR : 0025 *MC* MOUNT X00032 ON $T005
The substitution took place only for the second tape. Now you are asked to mount
the third tape from the original tape set, X00032.

A program uses this TAPECATALOG DEFINE for its output file:
11> ADD DEFINE =OUTFILE,&
11> & CLASS TAPECATALOG,&
Tape File Name Tape Name
Absolute
Generation
Physical
Copy
Logical
Copy
PAYROLL_BACKUP X00030,
X00031,
X00032
12 1 1
PAYROLL_BACKUP X00033,
X00034,
X00035
12 1 2