Explanation: CAPACITYMODE is an optional
subparameter of SELECT. The parameters of the CAPACITYMODE parameter
are explained:
- COMPATIBILITY
- lists all nonempty tape volumes that are written by an IBM® 3590 in 3490 emulation mode
that are not written in CAPACITYMODE(EXTENDED) mode. Data on these
tapes is accessible to IBM 3590
drives emulating 3490 drives, regardless of CAPACITYMODE switching
support.
- EXTENDED
- lists all nonempty tape volumes that are written by an IBM 3590 in 3490 emulation mode
that were written in CAPACITYMODE(EXTENDED) mode. Data on these tapes
is accessible only to tape units capable of CAPACITYMODE switching.
On input, DFSMShsm dynamically switches temporarily to CAPACITYMODE(EXTENDED)
to read the tape even if the unit name is in CAPACITYMODE(COMPATIBILITY).
Defaults: None.