Completing dynamic backouts and starting databases

Use the /DISPLAY DB BKERR command to determine whether dynamic DL/I backout has failed for any database on nonshared DASD. If it has, switch the DASD to make the database available to the alternate subsystem (using, for example, an IBM® 3814 switching unit), and issue a /START DB or UPDATE DB START(ACCESS) command for the affected database to perform the incomplete backout. For shared databases, include the GLOBAL keyword on the /START or route the UPDATE command to all IMS systems in the IMSplex.

The /DISPLAY DB BKERR command does not show databases and VSAM KSDSs stopped because of extents by the failing active subsystem in progress during takeover. The following messages inform you of these: DFS2012I, DFS0772I, and DFS0773I. These messages list stopped databases, stopped shared databases, and KSDSs that were not backed out.