DFSMSrmm calls the ACS routines to request the assignment of storage group and management class names for non-system-managed tape data sets. Table 1 lists the read-only variables that are set for DFSMSrmm requests.
| Variable | RMMPOOL Environment | RMMVRS Environment |
|---|---|---|
| &UNIT | Yes | Yes |
| &USER | Yes | Yes |
| &GROUP | Yes | Yes |
| &DSORG | Yes | Yes |
| &DSTYPE | Yes | Yes |
| &XMODE | Yes | Yes |
| &JOB | Yes | Yes |
| &DD | Optional for mount messages | Yes |
| &PGM | Optional for mount messages | Yes |
| &EXPDT | Optional for mount messages | Yes |
| &SYSNAME | Yes | Yes |
| &SYSPLEX | Yes | Yes |
| &STORGRP | Yes Pool prefix or name | Yes |
| &ACSENVIR | Yes RMMPOOL | Yes RMMVRS |
| &DSN | Yes | Yes |
| &HLQ | Yes | Yes |
| &LLQ | Yes | Yes |
| &NQUAL | Yes | Yes |
| &ACCT_JOB | Yes | Yes |
| &ACCT_STEP | Yes | Yes |
| &FILENUM | Optional for mount messages | Yes |
| &LABEL | Yes | Yes |
| &LIBNAME | Optional for JES3 fetch messages | Yes |
When the &ACSENVIR variable is set to RMMPOOL, DFSMSrmm requests you to return a storage group name. DFSMSrmm requests that both the management class and storage group ACS routines are run. With a combination of these routines, you can decide whether or not you want to return a storage group value and what the value will be. If a storage group name is returned, it must be a valid tape storage group name. Using different &ACSENVIR values helps you differentiate between DFSMSrmm requests for a storage group name and allocation requests for system-managed data sets.
When the &ACSENVIR variable is set to RMMVRS, DFSMSrmm requests you to return a management class name. DFSMSrmm requests that only the management class ACS routine is run. Using different &ACSENVIR values helps you differentiate between DFSMSrmm requests for a management class name and allocation requests for system-managed data sets.