Chapter 5. Disconnecting Power To The Bladecenter Unit - IBM BladeCenter S SAS RAID Controller Module Installation And User Manual

Chapter 5. Disconnecting power to the BladeCenter unit

This section describes the power-off sequence for the BladeCenter S chassis with
IBM BladeCenter S SAS RAID Controller Module installed.
About this task
If you are disconnecting power from the BladeCenter chassis for more than 72
hours, you must turn off IBM BladeCenter S SAS RAID Controller Module as part
of the chassis power-off procedure. This allows the RAID Controller to save the
cached data on the disk drives.
Disconnect power from the BladeCenter S chassis by shutting down all blade
servers and components and disconnecting the BladeCenter S chassis from all
power sources.
Note: A 9401 alert event is logged in the system if one of the following occurs:
v The IBM BladeCenter S SAS RAID Controller Module is not turned off and the
v You remove both SAS RAID Controller Modules, both backup battery modules,
If the IBM BladeCenter S SAS RAID Controller Module is not turned off and the
BladeCenter chassis is disconnected from the power source for more than 72 hours,
the backup battery units require a period of charging time before they can provide
power for the RAID Controller memory cache. During this charging period, the
RAID Controller enters into a cache write-through mode. This causes a significant
delay in processing speed.
Before you install or remove any components in the chassis, review and resolve
any active alerts for the components. Refer to the related sections in
"Non-concurrent repair procedures" on page 154 and "Concurrent repair
procedures" on page 164 for more information on repair procedures.
To turn off the BladeCenter S chassis, complete the following steps:
Procedure
1. Turn off the blade servers:
2. Turn off the SAS RAID Controller Modules:
© Copyright IBM Corp. 2008, 2013
chassis is disconnected from the power source for more than 72 hours
or the media tray without performing a proper power-off procedure
a. Stop all blade server I/O applications and shut down the operating
systems. See the documentation that comes with your blade server for
information about shutting down the operating system on the blade server.
b. Log on the Advanced Management Module (AMM).
c. Select Blade Tasks > Power/Restart.
d. Select all blade servers.
e. From the Available actions list, select Power Off Blade and click Perform
action.
f. Make sure that all blade servers are Off.
a. In the AMM, select I/O Module Tasks > Admin/Power/Restart.
b. Select the bays in which the SAS RAID Controller Modules are installed.
31