Restoring the database before updates are made

Restoring a database to its HDAM or HIDAM structure is simplest if you have not updated the database since you converted it to HALDB.

To fall back to HDAM or HIDAM if the database has not been updated since it was converted to HALDB, perform the following steps:

Procedure

  1. Change the DBD to its former specifications
  2. Delete the HALDB database information from the RECON data set
  3. If the non-HALDB database data sets have been deleted, restore them from the last image copies and any necessary logs. You will need logs only if the database was updated after you created the last image copies but before you started the conversion process.
  4. Register the non-HALDB database with DBRC
  5. Take an image copy of the database data sets