gtpo1mf3Operations

ZSONS ALTER SCP-Alter RCS State Change Pending Timeout Value

Use this command to set the timeout value for the record cache subsystem (RCS) state change pending monitor (SCPM) routine. The RCS SCPM monitors the DASD I/O to ensure that the DASD devices are responding in a timely method. This time value allows the monitoring of RCS devices that have entered a state change pending condition because of an error recovery action at the device or control unit.

This command does the following:

  1. Starts the RCS SCPM (if the value specified for this command is not 0).
  2. The RCS SCPM attempts to monitor and report stalled module queues because of RCS state change pending conditions for DASD devices.
  3. If the state change pending condition persists for a time period exceeding the specified interval, the RCS SCPM will initiate action to take the module offline.
    Note:
    The state change pending condition timing period represents the time period from the point at which the state change pending unit check is reported by the device until a valid ending device status is received for a given I/O operation.

Requirements and Restrictions

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

Format




Time-seconds
specifies the time interval that the RCS SCPM waits before initiating action to take the device offline once an RCS state change pending condition is detected, where seconds is the number of seconds from 0-9999.

Notes:

  1. If you specify 0, no SCPM monitoring will be performed.

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

Additional Information

Examples

In the following example, the state change pending timeout value for the RCS SCPM recovery routine is set to 15 seconds.

+--------------------------------------------------------------------------------+
|User:   ZSONS A SCP T-15                                                        |
|                                                                                |
|System: SONS0007I 12:22:42 RCS STATE-CHANGE-PENDING TIMEOUT VALUE IS 15         |
+--------------------------------------------------------------------------------+

Related Information