Changing TIMEOUT for all SC sessions

You can change the TIMEOUT value for all volumes in an XRC session by issuing the XSET command. Specifying the TIMEOUT option, with the SSID(ALL) subparameter, changes the time for all storage controls. When a session is suspended, the current timeout value (the last value specified) remains in effect for the restarted sessions.

An XRC session called TUCSON is currently running with a timeout value set to the default of five minutes. You want to change the timeout value for all of the storage controls to be one minute.

Issue the following command so that all storage controls have a timeout value of one minute.
```
XSET TUCSON TIMEOUT(00.01.00)
```
Some of the hardware that is related to the session requires planned maintenance that will take two hours. You need to suspend the session during this time. You have planned the suspension to happen during a time when application updates are minimal.
Issue the following command:
```
XSUSPEND TUCSON TIMEOUT(02.00.00)
```
For 3990 or 9390 Storage Controls, if there are sufficient updates during this time it is possible that the storage control session can be canceled. For ESS storage subsystems, the hardware bitmap function keeps the storage control session active regardless of the timeout value that you have specified.

Normal data processing continues.
Issue the following command to restart the session named TUCSON because the hardware updates have been completed:
```
XSTART TUCSON SESSIONTYPE(XRC) ERRORLEVEL(SESSION)
```
The SDM automatically sets the timeout value in the storage controls to the value specified by the last XSET command, which was TIMEOUT(00.01.00).
Issue the following command so that XRC can add all volumes back to the session and resynchronizes them using the hardware or software bitmaps.
```
XADDPAIR TUCSON SUSPENDED
```