Recovering from z/OS or power failure

You can recover from a situation in which z/OS® or your processor power fails.

Symptoms

No processing is occurring.

Resolving the problem

Operator response:

• If the power failure or z/OS failure has occurred:
  1. IPL z/OS, and initialize the job entry subsystem (JES).
  2. If you normally run VTAM® with Db2, start VTAM at this point.
  3. Start the IRLM if it was not set for automatic start during Db2 installation.
  4. Start Db2.
  5. Use the RECOVER POSTPONED command if postponed-abort units of recovery were reported after restarting Db2, and if the AUTO or LIGHTAUTO option of the LIMIT BACKOUT field on installation panel DSNTIPL was not specified. If the LIGHTAUTO option is specified, postponed-abort units of recovery are processed during the next normal Db2 restart.
  6. Restart IMS or CICS®.
     • IMS automatically connects and resynchronizes when it is restarted.
     • CICS automatically connects to Db2 if the CICS PLT contains an entry for the attachment facility module DSNCCOM0. Alternatively, use the command DSNC STRT to connect the CICS attachment facility to Db2.
• If you know that a power failure is imminent, issue a STOP DB2 MODE(FORCE) command to allow Db2 to stop cleanly before the power is interrupted. If Db2 is unable to stop completely before the power failure, the situation is no worse than if Db2 were still operational.