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HSMS (Hierarchical Storage Management System) can be used to make online backups of UDS/SQL database files (see section “Saving a database online”).
HSMS also permits the automatic export to alternative media of files that have not been accessed for a considerable period, see the manual "HSMS / HSMS-SV (BS2000)". If an exported file is accessed then HSMS retrieves it automatically.
In principle, UDS/SQL files can also be swapped out using HSMS.
If a database is inconsistent as an online backup or due to a DBH crash and it is swapped out using HSMS before the warm start, the DBH may reject the warm start after the file has been swapped back in.
In this case, you must use the BMEND utility routine to update the database to the point at which the crash occurred before you attempt to perform a warm start (see the manual "Recovery, Information and Reorganization", BMEND statement UPDATE-DATABASE).
In this case, you must use the BMEND utility routine to update the database to the point at which the crash occurred before you attempt to perform a warm start (see the manual "Recovery, Information and Reorganization", BMEND statement UPDATE-DATABASE).