Nonstandard image copy data sets

You can create backup copies of DBDSs by using some means other than the Database Image Copy utility.

For example, you could make a copy of the volume on which a DBDS resides. DBRC does not record the existence of these nonstandard image copy data sets in the RECON data set automatically; use a NOTIFY.UIC command to inform the RECON data set of these data sets. If this information is not recorded in the RECON data set, DBRC might misinterpret subsequent information about changes to the DBDS. You cannot issue the NOTIFY.UIC command for a DBDS that is defined with the REUSE option.

Before recovering a DBDS or DEDB area with a nonstandard image copy data set, perform the following steps:

1. Close the database using /DBR (without NOFEOV). Load the data set from the nonstandard image copy (UIC) and record the event in the RECON data set (by issuing NOTIFY.RECOV with RCVTIME specified).
2. Apply the change records from the logs that were produced since the UIC (by running DBRC with USEDBDS or USEAREA for the GENJCL.RECOV command or DFSDUMP DD DUMMY statement in the DBRC JCL).

DBRC does not allow DBRC to process any log that contains changes outside the recovery range because an image copy is not used for Step 2. The recovery range is defined by the time-stamp recovery record RECOV TO (image copy time) and RUNTIME values.

For more information about recovering a DBDS or DEDB area with a nonstandard image copy data set, see IMS Version 15.5 Database Administration.