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3–2
HSG80 Array Controller V8.7 Maintenance and Service Guide
Replacement Procedures for BA370 Enclosure Elements
•
In single-controller configurations, shut down “this controller” with the
following command:
SHUTDOWN THIS_CONTROLLER
•
In dual-redundant controller configurations, shut down the “other controller”
first, then shut down “this controller” with the following commands:
SHUTDOWN OTHER_CONTROLLER
SHUTDOWN THIS_CONTROLLER
NOTE: After the controllers shut down, the reset buttons and the first three LEDs turn
O
N
(see Figure 3–1). This might take several minutes to happen, depending on the
amount of data that needs to be flushed from the cache modules.
Proceed only after the reset buttons stop F
LASHING
and remain O
N
.
Figure 3–1: Controller reset button and first three LEDs
5. Remove power to the subsystem.
CAUTION: When shutting down the controller for longer than one day, perform the
steps in the next section, “Disabling the External Cache Batteries (ECBs)” to prevent
these write-back cache batteries from discharging.
1
Reset button
2
First three LEDs
1
2
3
4
5
6
CXO6991A
2
1