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Appendix F. BladeCenter power
module upgrade guidelines


Attention
Attention:
A four-digit feature code is used to specify a component that is configurable in the IBM configurators, the eBusiness Configurator (eConfig) and the IBM Web-based Hardware Configurator, used in US and Canada. Options that do not have feature codes cannot be integrated by IBM into a system using these IBM configurators. To purchase options separately, refer to the option part number provided in this document.

BladeCenter Addition information
Overview   |   Upgrade calc.   |   Distribution   |   Worksheets   |   Example calc.   |  

Your BladeCenter unit is separated into two power domains.
Power domain A supports all the BladeCenter modules and bays 1 through
6; power domain A uses power modules 1 and 2.

Power domain B supports bays 7 through 14 and uses power modules
3 and 4. To support devices in power domain B, a power-supply option
(consisting of two power modules) must be installed.

BladeCenter unit frontview



BladeCenter unit rear view


Important:
  1. The power modules must be installed in pairs in a domain and
    must match each other in capacity (wattage, amperage, and so on).
  2. A power domain operating above the capacity of a single power
    module results in a nonredundant power condition.
  3. In a pair of power modules, a power module that is not connected
    to 200-240 volt ac power source results in a nonredundant power
    condition.
  4. To provide true redundant power, BladeCenter power modules 1
    and 3 must be connected to a different 200 - 240 volt ac power source
    than power modules 2 and 4.
  5. An installed power module must be connected to an ac power source
    and must not be used as a filler module.

The following tables list the power requirement for each IBM® BladeCenter
blade server or option that is available as of the date of this
printing. These power requirements assume that each blade server
is fully configured and are based on typical workloads. Use the
values in these tables and complete the upgrade calculation
(see Upgrade calculation) to determine which power modules are
needed to deliver full power redundancy for your configuration.

Table 1. HS20 blade server power values
BladeCenter HS20 blade server IBM power units for the corresponding number of installed microprocessors
  1 microprocessor 2 microprocessors
2.0 GHz/400 MHz (8678-21X) 0.9 1.1
2.4 GHz/400 MHz (8678-41X) 0.9 1.2
2.6 GHz/400 MHz (8678-51X) 1.0 1.2
2.8 GHz/400 MHz (8678-61X) 1.0 1.3
2.4 GHz/533 MHz (8832-9TX) 0.9 1.2
2.8 GHz/533 MHz (8832-21X, 8832-L1X, 8832-LTX) 1.0 1.5
3.06 GHz/533 MHz (8832-31X, 8832-M1X) 1.2 1.6
3.06 GHz/533 MHz (8832-N1X) Does not apply 1.9
3.2 GHz/533 MHz (8832-G1X, 8832-J1X, 8832-GTX) 1.2 1.65
2.8 GHz/800 MHz (8843-L1X and 8843-LTU) 1.05 1.55
2.8 to 3.8 GHz/800 MHz (all 8843 except as listed above) 1.4 2.3

Table 2. HS40 blade server power values
BladeCenter HS40 blade server (occupies 2 bays) IBM power units and the corresponding number of installed microprocessors (power unit value for each bay)
  1 microprocessor 2 microprocessors 3 microprocessors 4 microprocessors
2.0 GHz/400 MHz (8839-21X) 0.70 0.90 1.10 1.30
2.8 GHz/400 MHz (8839-41X) 0.75 1.0 1.30 1.55

Important:

The HS40 blade server occupies two adjacent bays. When you complete
the Power worksheets, enter the power unit value from Table 2 twice,
once for each bay that the blade server occupies. If you install
an HS40 blade server in bays 6 and 7, the blade server will use
power from both power domain A and power domain B. In the power
worksheets, enter the power unit value twice, once for bay 6 of
power domain A and once for bay 7 of power domain B.

Table 3. 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 4. 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 5. BladeCenter expansion unit power values
BladeCenter Expansion unit1 IBM power units
SCSI Storage Expansion Unit, SCSI Storage Expansion Unit 2 0.4
Note:
  1. The SCSI Storage Expansion Unit is not available for the LS20
    blade server.

October 7, 2008