Switch Off PDU Circuit Breakers
Switch off the circuit breakers to remove power from the server only after you have powered off the server.
Note - The sequence in this section, where power is removed first from the even numbered power supplies, and then from the odd numbered power supplies, applies to factory-installed configurations with a SPARC M8-8 or a SPARC M7-8 server in the bottom of an Oracle rack. In other configurations, where a SPARC M8-8 or SPARC M7-8 server might be installed in a different location in the rack, power is still removed first from the even numbered power supplies, and then from the odd numbered power supplies. See Remove a PDU for detailed steps for various configurations.
Note - In configurations where additional equipment is installed in the rack, and you do not want to power down the additional equipment, remove power by unplugging the AC input power cords at the SPARC M8-8 or SPARC M7-8 AC inlets. First, unplug the power cords at the even numbered AC inlets 0, 2, 4. Next, unplug the power cords at the odd numbered AC inlets 1, 3, 5.
 | Caution - Because standby power is always present in the server, you must switch off the circuit breakers on the PDUs before servicing any component that requires the server to be powered off. |
- Ensure that you have powered off all hosts and the server.
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Turn breakers off in the following sequence.
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For SPARC M8-8 and SPARC M7-8:
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R6, R7, R8
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L2, L1, L0
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For SPARC M7-16:
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R4, R5, L5, L4
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R0, R1, R2, L8, L7, L6
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R6, R7, R8, L2, L1, L0
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where R indicates the right PDU from the rear of the server (PDU B), L indicates the left PDU from the rear of the server (PDU A), and the number represents the PDU group number.
Caution - Because standby power is always present in the server, you must switch off the circuit breakers on the PDUs before accessing any cold-serviceable components.
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- If you are servicing a component, return to the procedure for that component.