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14: Maintenance and Upgrade Procedures
Preparing Server for Maintenance or Upgrade
To prepare the server for maintenance, follow these steps:
1.
If you are logged on to the server, log out.
At your system console, switch to L2 mode by entering the following command:
$> Ctrl+T
From the L2 prompt (L2>), power off the server with the following command:
L2> pwr d
2. Locate the PDU(s) in the rear of the rack and turn off the circuit breaker switches on
each PDU.
Returning Server to Operation
When you finish installing or removing components, return the server to operation as
follows:
1.
Turn each of the circuit breaker switches to the “on” position.
2. At your system console, enter the following command:
L2> pwr u
3. To ensure that the power-on procedure is proceeding properly, verify that the LEDs
illuminate green and that your controllers display that the server is powered on for
each segment of the procedure.
If your server does not boot correctly, see “Troubleshooting Chart” in Chapter 15, for
troubleshooting procedures.
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