How to Power off the Controller
Controller and Disk Shelf Prerequisite Tasks
This section describes the prerequisite tasks for servicing controllers and disk shelves:
■
“How to Power off the Controller” on page 41
■
“How to Extend the Storage Controller from the Rack” on page 41
■
“How to Remove the Top Cover” on page 42
■
“How to Power off the Disk Shelf” on page 43
How to Power off the Controller
Use the following procedure to power off the controller.
Some replacement tasks require you to power off the controller. Note that
there will be a loss of access to the storage unless the system is in a clustered
configuration. Shut down the controller using one of the following methods:
■
Log in to the BUI and click the power icon
on the left side of the masthead.
■
SSH into the appliance and issue the command
maintenance system poweroff
.
■
SSH or serial console into the service processor (SP) and issue the command
stop /SYS
.
■
Use a pen or nonconducting pointed object to press and release the Power button on the
front panel.
■
To initiate emergency shutdown during which all applications and files will be closed
abruptly without saving, press and hold the power button for at least four seconds until the
Power/OK status indicator on the front panel flashes, indicating that the storage controller is
in standby power mode.
How to Extend the Storage Controller from the Rack
Use the following procedure to extend the storage controller from the rack.
1.
Disconnect the AC power cords from the rear panel of the storage controller.
Caution -
Because 3.3 VDC standby power is always present in the system, you must unplug
the power cords before accessing any cold-serviceable components.
2.
Disconnect the data cables and disk shelf cables from the back of the storage
controller. Be sure the cables are labeled for proper connection later.
Servicing the Hardware
41
