
Managing Tape Volumes
User Reference
Connectivity Systems, Inc.—Copyright © 2006
Use Pursuant to Company Instructions
12-3
Scratch Tapes Scratch tapes are produced by the SCRATCH function of TSIDUTL,
TSIDMNT, and Online Manager. TSIDUTL DSPLY SCRATCH
produces a report listing of all available scratch tapes. TSIDUTL
PSCRATCH creates a report projecting which tapes will be eligible for
scratch on a certain date.
See the BIM-EPIC Installation and System Guide for additional
information describing the TSIDUTL JCL requirements.
Tape Pooling You can use tape pooling to group similar types of tapes into tape pools.
For example, your ACL-resident tapes could constitute one pool, TPA
tapes another pool, 3490E tapes a third pool, and so forth. Datasets are
assigned to tape pools through the DSN Catalog. When a pooled dataset is
created, BIM-EPIC automatically requests the operator to mount a scratch
tape from the appropriate pool.
Tape pools are established using the TSIDPOL macro and the TAPPOL
configuration option. Each pool is given a one-character pool ID, A to Z
or 0 to 9, and is assigned one or more volume serial number ranges.
If a volume serial number falls within a pool range, the tape belongs to
that pool. A pool tape can be used only to write datasets assigned to that
pool. If a volume serial number does not fall in any of the defined ranges,
the tape is not a pool tape. The volume serial number can be used only to
write datasets that are not assigned to a tape pool.
Datasets can be assigned to tape pools through Online Manager,
TSIDMNT CAT and UPD functions, or by using OPTION=TPL=x on a
DD statement.
Tape
Ownership
The tape ownership feature provides another form of tape volume
association. Owner ID, a two-character code, is used as the first two
characters in a volume serial number.
When a DSN/Job Cross-Reference report dataset is cataloged with an
owner ID, it can be written only on tapes with volume serial numbers
which begin with the specified owner ID code.
Tape ownership is different from tape pooling because a pool tape can be
used only for datasets assigned to that pool. Tape ownership does not
restrict the use of tapes in that way, only the serial number is restricted.
The tape can be used for any dataset.
Specifying Tape
Size
For reel tape volumes you can restrict datasets to small or large tapes with
the size specification feature.
Commenti su questo manuale