IBM X3850 X6 User Manual

Chapter 4. Infrastructure planning 115
򐂰 Four 900W
򐂰 Four 1400W
򐂰 Four 750W DC
There are two different 1400W power supply units available, a standard 1400W PSU and a
high altitude 1400W PSU. The high altitude PSU should be used when the server’s location is
at an altitude higher than 5000 meters from sea level. It is not advised to mix the high altitude
PSUs with the standard 1400W or 900W PSUs, as this will nullify the high altitude
capabilities.
Table 4-4 shows the different power supply installation configurations, the policies, and the
level of redundancy achieved depending on the type and number of power supplies installed.
Table 4-4 Power supply installation and redundancy
4.5.3 Rules for achieving redundancy
In order to achieve power supply and power feed redundancy, observe the following rules:
򐂰 Power supplies in bays 1 and 3 (Group A) and bays 2 and 4 (Group B) must be balanced
in both quantity and power output (A=B).
򐂰 Power feeds to Group A and Group B must be different for redundancy. See Figure 4-3 on
page 116.
򐂰 Mixed wattages must also be balanced on Group A (900W/1400W) and Group B
(900W/1400W).
򐂰 IMM2 Code requires power supplies in bays 1 and 3 to be wired to feed 1, and power
supplies in bays 2 and 4 to be wired to feed 2. This is due to how the power supplies are
internally connected and how the IMM2 determines if the system is redundant based on
the policy selected. If the power supplies are not correctly connected, the selected IMM2
policy may not function as intended.
Power
supply 1
Power
supply 2
Power
supply 3
Power
supply 4
Fully
redundant
AC source
Power
module
redundant
Non-
redundant
1400W 1400W 1400W 1400W Ye s Ye s Ye s
1400W 900W 900W 1400W Ye s
a
a. Workload and configuration dependent. Use the IBM Power Configurator to plan for your level of redundancy:
http://ibm.com/systems/bladecenter/resources/powerconfig.html
No Ye s
900W 1400W 1400W 900W Ye s
a
No Ye s
None
1400W 1400W None Ye s
a
No Ye s
None None
1400W None No No Ye s
900W 900W 900W 900W Ye s
a
Ye s Ye s
None
900W 900W None Ye s
a
No Ye s
None None
900W None No No Ye s
750W DC 750W DC 750W DC 750W DC Ye s
a
Ye s Ye s

IBM X3850 X6 Specifications

General

Brand	IBM
Model	X3850 X6
Category	Server
Language	English