3-4 SPARC Enterprise M8000/M9000 Servers Site Planning Guide • April 2008

3.1.3 Vibration Requirements

The allowable vibrations in the SPARC Enterprise M8000/M9000 servers are listed in
TABLE 3-3.
3.2 Electrical Specifications
SPARC Enterprise M8000/M9000 servers can use two types of power supply: single-
phase power and three-phase power. Redundant power cables are supported only
on servers that have the dual power feed option. The dual power feed option is
included by default on servers that are configured for three-phase power.
Note – Power cables are not redundant on single power feed servers without the
dual power feed option. On servers that have single power feed, all power cables
must be connected and powered on at all times.
Note – With the dual power feed option, all wiring connected to the server is used
to supply power, and the load is balanced at 50%/50%. Note that even if an
extremely low load compromises the load balancing, it will not affect operation.
TABLE 3-4 to TABLE 3-6 list the power requirements for single-phase and three-phase
power supplies.
TABLE 3-3 Specifications (Allowable Vibration)
System name
Allowable vibration [gal]
Operating Non-Operating
SPARC Enterprise M8000 server
SPARC Enterprise M9000 server
250 1
1 Allowable vibration (Sun and Fujitsu standards) for artificially generated seismic waves
400 1, 2
2 The value for non-operation is applicable when vibration-proofing measures are taken for the leveling feet.