IBM SCOD-3ZVQ5W - Manual (Page 538)

530 COG
Notes:
1.
The SCSI Storage Expansion Unit is not available for the LS20 blade server.
Upgrade calculation
To determine the power-module capacity that is needed to maintain full redundancy in each power domain,
complete the following steps.
If you have two 2000 W power modules installed in power domain A and two 2000 W power modules
installed in power domain B, you do not need to complete this upgrade calculation. Your system meets the
requirements to maintain full power redundancy in both domains.
Attention: If you are replacing the existing power modules with 2000 W power modules, you must upgrade
the management-module firmware. If two management modules are installed in the BladeCenter unit, both
management modules must be upgraded to the same level of firmware. Go to the IBM Support Web site at
http://www.ibm.com/support/ and obtain the latest firmware.
1. In the power worksheets on page 532, list the blade servers or other devices that are installed in the bays.
2. In the tables on page 529, look up the number of IBM power units associated with each device and enter
it in the applicable power worksheet (see “Example calculation” on page 532).
3. Add all of the IBM power unit values for each domain and enter the totals.
4. To maintain full power redundancy in power domain A, make sure that the power modules in bays 1
and 2 are connected to different 200 - 240 volt ac power sources and meet the requirements in the
following table:
Table 155. JS20 blade server power values
BladeCenter JS20 blade server
IBM power units for two
installed microprocessors
1.6 GHz/800 MHz (8842-21X) 1.5
2.2 GHz/1.1GHz (8842-41X) 1.6
Table 156. LS20 blade server power values
BladeCenter LS20 blade server
IBM power units for the corresponding
number of installed microprocessors
1 microprocessor 2 microprocessors
2.0 to 2.6 GHz Single Core (8850-51X, 8850-71X, 8850-81X) 1.2 1.8
2.0 GHz Dual Core (8850-55x) 1.2 1.8
Table 157. BladeCenter expansion unit power values
BladeCenter Expansion unit 1 IBM power units
SCSI Storage Expansion Unit, SCSI Storage Expansion Unit 2 0.4