When you are using tapes at a remote site, keep in mind that the remote site must utilize all data that is written by the home site. Data that is written to tapes with CAPACITYMODE(EXTENDED) specified, requires that there be an esoteric unit defined at the remote site with only CAPACITYMODE switchable drives.

Guideline: Until this environment is established at both locations, use drives that are capable of operating in a CAPACITYMODE(COMPATIBILITY) environment.

The SELECT (CAPACITYMODE(EXTENDED| COMPATIBILITY) option of the LIST TTOC command lists the CAPACITYMODE characteristics of tapes that are written in an HSMplex.

Data created at the home site on esoteric units with CAPACITYMODE(COMPATIBILITY) specified can be read on esoteric units at the remote site that have CAPACITYMODE(EXTENDED) specified. The tapes that contain this data are not selected for output by esoteric units that have CAPACITYMODE(EXTENDED) specified while they still contain CAPACITYMODE(COMPATIBILITY) data.

The ABACKUP function does not write data in CAPACITYMODE (EXTENDED). If user tapes that were created with CAPACITYMODE(EXTENDED) specified accompany the ABACKUP data, tape drives that are CAPACITYMODE switchable will be needed at the ARECOVER site to read them.