gtpo1mf1Operations

ZSONS ALTER HALT-Alter Halt Timeout Value

Use this command to set the timeout value for the lost interrupt recovery routine in the DASD missing interrupt handler (DMIH). The DMIH monitors the DASD I/O to ensure that the DASD devices are responding in a timely method.

This command does the following:

  1. Starts the DMIH (if the value specified for this command is not 0).
  2. The DMIH attempts to stop and restart requests that were active for longer than a specified period of time and, as a result, issues a CTL-03A dump.
  3. If the request does not complete again in the specified time interval, the DMIH stops the request and takes the module offline.

Requirements and Restrictions

You can enter this command only for the basic subsystem (BSS).

Format




Time-seconds
specifies the time interval that the DMIH waits before stopping and restarting a request after a 5-second timeout interval ends, where seconds is the number of seconds from 0-999.

Notes:

  1. If you specify 0, no recovery routines are started.

  2. The time interval is initially set to 0 by the TPF system.

Additional Information

Examples

In the following example, the lost interrupt timeout value for the DMIH recovery routine is set to 15 seconds.

+--------------------------------------------------------------------------------+
|User:   ZSONS A H T-15                                                          |
|                                                                                |
|System: SONS0001I 09.40.59 HALT TIMEOUT VALUE IS  15                            |
+--------------------------------------------------------------------------------+

Related Information

See TPF Database Reference for more information about DASD support.