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4.3 Enabling/Disabling Dual Power Feed


4.3 Enabling/Disabling Dual Power Feed
Four power supply units are mounted on the SPARC M12-2/M12-2S. For dual power systems, each system has two power supply units.
e.g., PSU#0/PSU#1 for power system 0, PSU#2/PSU#3 for power system 1
When the dual power feed is enabled/disabled, the PSU status and system operation are as shown in Table 4-1.
Table 4-1  Dual Power Feed Settings and Power Supply Unit (PSU) Status Enabling System Operation for the SPARC M12-2/M12-2S
Dual Power Feed Setting PSU Status System Operation
Disabled
2 or more operating PSUs
Operable
No more than 1 operating PSU Non-operable
Enabled
2 operating PSUs on at least 1 of power systems
Operable
No more than 1 operating PSU on both power systems Non-operable
Two power supply units (PSUs) are mounted on the SPARC M10 and SPARC M12-1. Since PSUs are redundant, the system can operate as long as at least one PSU is operating. Therefore, even if the dual power feed function is enabled/disabled, it does not affect the system operation.