ARCHIVE and HSMS

HSMS (Hierarchical Storage Management System) is a software product used for backup operations and to support data management on external storage media under the BS2000 system.

HSMS uses ARCHIVE to copy files between the different storage levels. All I/O operations initiated by HSMS are executed via ARCHIVE runs, and all entries in the directories are made via ARCHIVE.
HSMS manages the data in save files and archive directories which are largely compatible with those of ARCHIVE, as long as functions not specific to HSMS are used (see the “HSMS” manual [9]).

We strongly recommend that you use either only ARCHIVE or only HSMS. If you use both ARCHIVE and HSMS, incompatibilities may result unless you work with different directory files. For instance, a SAVE or RESTORE run under ARCHIVE is not possible with a directory file which was created with HSMS or which is administered by HSMS.

Migrated files

HSMS supports migrated files. A migrated file is one whose data is written to a save file and deleted at the processing level (in order to make space there), but whose catalog entry is retained. The file is flagged in the catalog as migrated; it continues to be addressable via the catalog, even in the case of access attempts via the BS2000 OSD/BC Data Management System (DMS). Here, too, HSMS and ARCHIVE must be loaded in the system.

ARCHIVE can process a migrated file with SAVE under the user ID TSOS. In this case, only the catalog entry of the file with the save type MIGF is saved.

It is not possible to process migrated files with EXPORT; any attempt to do so will result in error messages.

All users are permitted to use RESTORE and IMPORT on migrated files. Migrated files cannot be renamed with RENAME. The SPACE operand is ignored in the case of migrated files.