The opposite of migration, the copying of migrated data back to the processing level, is called recall. The number of files that can be recalled to S0 is restricted by the space allocated to the individual user IDs.
Only files cataloged as migrated files and only that version in the migration archive which matches the catalog entry can be recalled. The current state of a file at the processing level cannot be changed by recall.
Nonprivileged users can recall migrated files of a foreign user ID if they are co-owners or the file protection attributes permit access from another user ID.
Warning
The following file attributes are modified by a recall: CFID (coded file ID), DEVICE-TYPE, SUPPORT, VOLUME and EXTENTS. This must be taken into consideration in applications which evaluate these attributes.
HSMS offers two different ways of recalling a migrated file, which are described below.