In systems running under JES3, three kinds of pools exist. In addition
to the user-defined pools that you define as described earlier, DFSMShsm
configures a general pool from the unit control block associated with
primary volumes and from information obtained from the ADDVOL command. The general pool is
a collection of all primary volumes that:
- Are online.
- Are permanently resident or reserved.
- Have a primary volume attribute of AUTORECALL.
- Are mounted with the use attribute of storage or private. (The
private volumes are included only if you specify the SETSYS RECALL(PRIVATE)
command.)
Volumes in the general pool can also be defined in one or more
data set or volume pools. The general pool is the default pool where
DFSMShsm recalls migrated data sets if they are not restricted for
recall to a user-defined pool.