On a CAPACITYMODE-switchable 3590 or 3592 device that is emulating
a 3490 device, you have an option when you specify tape capacity.
You can specify either to fill tapes to their full capacity or to
stop at a point compatible with non-CAPACITYMODE-switchable devices.
You specify whether to fill tapes to their full capacity using the
SETSYS TAPEUTILIZATION (UNITTYPE(unittype)...CAPACITYMODE(COMPATIBILITY|EXTENDED))
command.
Note: CDS backup, ABARS output, and DUMP tapes
do not support this function because they do not have the same block
limitation as the supported functions.
DFSMShsm writes to 97% of the capacity of MEDIA5, MEDIA6, MEDIA7,
MEDIA8, MEDIA9, MEDIA10, MEDIA11, MEDIA12, and MEDIA13 tapes unless
you specify otherwise through the SETSYS TAPEUTILIZATION command.
DFSMShsm uses the reported cartridge type on the physical device to
determine the tape capacity.