Lenovo ThinkSystem SR950 7X12 - Page 87

• 1100–watt power supplies accept either 100-127 vac or 200-240 vac input.
• 1600–watt power supplies accept only 200-240 vac input.
• The server supports the following power supply configurations:
– For two processor server configurations, one or more 1600–watt or 1100–watt power supplies.
– For four processor server configurations, two or more 1600–watt or 1100–watt power supplies.
– For eight processor server configurations, two or more 1600–watt or four 1100–watt power supplies
Attempting to operate the server with an unsupported power configuration results in an “unsupported
configuration” message in the system event log and on the system front panel
• Power supplies can be installed in any power supply bay and populated in any order. Redundancy differs
depending on how many processors are installed, the number of power supplies that are required to keep
the system operating, which power supply bays are populated, and the number of input power sources,
as shown in the following table.
Table 21. Power supply redundancy
Total number of
processors
installed in server
Minimum number
of power
supplies to
maintain system
operation
Bays where
power supplies
are installed
Power supply
redundancy —
single input
power source
Power source
redundancy —
multiple input
power sources
(see Note 1)
2
1 1
no no
2
1
2
no no
2
1
3
no no
2
1 4
no no
2
1
1, 2
yes yes
2
1
1, 3
yes no
2
1 1, 4
yes yes
2
1
2, 3
yes yes
2
1
2, 4
yes no
2
1
3, 4
yes yes
4 or 8 2 1, 2
no no
4 or 8 2 1, 3
no no
4 or 8 2
1, 4
no no
4 or 8 2 2, 3
no no
4 or 8 2 2, 4
no no
4 or 8 2 3, 4
no no
4 or 8 2 1, 2, 3
yes
yes/no
4 or 8 2 1, 2, 4
yes
no/yes
4 or 8 2 1, 3, 4
yes
yes/no
4 or 8 2 2, 3, 4
yes
no/yes
4 or 8 2 1, 2, 3, 4
yes yes
Chapter 3. Server hardware setup 83