Chapter 5. Replacing Components
EK–SMCPR–UG. A01
5–11
5.6.2.1 Shutting Down the Subsystem for a Cold Swap
Use the following steps to shut down the subsystem:
1. Connect a PC or terminal to the maintenance port of one of the array controllers in
your subsystem, if it is not already connected.
2. From a host console, stop all host activity and dismount the logical units in the
subsystem.
3. Shut down the array controllers. In single-controller configurations, you only need
to shut down “this controller.” In dual-redundant array controller configurations,
shut down the “other controller” first, then shut down “this controller” with the
following commands:
SHUTDOWN OTHER_CONTROLLER
SHUTDOWN THIS_CONTROLLER
When the array controllers shut down, their reset buttons and their first three LEDs
are lit continuously. This may take several minutes, depending on the amount of
data that needs to be flushed from the cache modules.
4. Turn OFF the ac input power entry controllers on the master enclosure.
5. Turn OFF the ac input power entry controllers on the expansion enclosures.
CAUTION
If you are shutting down the array controller for longer than
one day, perform the steps in “Disabling the External Cache
Battery,” in section 5.6.2.3.
This process prevents the write-
back cache batteries from discharging.
5.6.2.2 Turning on the Subsystem
Use the following steps to turn on the subsystem:
CAUTION
To allow the array controller to properly recognize
addresses, ensure that you turn on the expansion
enclosures before turning on the master enclosure.
1. On the expansion enclosures, turn on all ac input power entry controllers.
2. On the master enclosure, turn on all ac input power entry controllers.