IBM 8668 Hardware Maintenance Manual - Page 84

Power supply conversion from non-redundant to redundant, Removing the existing power supply

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5. Plug the power cord for the power supply into the power cord connector. Route the power cord through the cable-restraint bracket. Then, plug the other end of the cord into a properly grounded outlet. 6. If you turned off the server in step 1a on page 75, turn on the server and peripheral devices. 7. Verify that the ac power light and dc power light are lit, indicating that the power supply is operating correctly. Power supply conversion from non-redundant to redundant You can build a fault-tolerant power system by upgrading to a power-sharing backplane. The power-sharing backplane replaces the standard power backplane and allows you to use up to three 250-watt hot-swap power supplies for power sharing. You can maintain a redundant configuration with two power supplies, which allows the system to continue operation even if one power supply fails. Implementing a third power supply ensures redundancy even if one power supply fails. The backplane will alert you when redundancy is lost with the two or three power supplies configuration. Removing the existing power supply: Use the following steps to remove the existing 385-watt power supply from the server: 1. Turn off the server and peripheral devices and disconnect all external cables and power cords; then remove the cover (see "Removing the cover, door, and bezel" on page 48 for details). Statement 1: 76 Hardware Maintenance Manual: xSeries 232, Type 8668

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5.
Plug the power cord for the power supply into the power cord connector.
Route the power cord through the cable-restraint bracket. Then, plug the other
end of the cord into a properly grounded outlet.
6.
If you turned off the server in step 1a on page 75, turn on the server and
peripheral devices.
7.
Verify that the ac power light and dc power light are lit, indicating that the
power supply is operating correctly.
Power supply conversion from non-redundant to redundant
You can build a fault-tolerant power system by upgrading to a power-sharing
backplane. The power-sharing backplane replaces the standard power backplane
and allows you to use up to three 250-watt hot-swap power supplies for power
sharing. You can maintain a redundant configuration with two power supplies,
which allows the system to continue operation even if one power supply fails.
Implementing a third power supply ensures redundancy even if one power supply
fails. The backplane will alert you when redundancy is lost with the two or three
power supplies configuration.
Removing the existing power supply:
Use the following steps to remove the
existing 385-watt power supply from the server:
1.
Turn off the server and peripheral devices and disconnect all external cables
and power cords; then remove the cover (see “Removing the cover, door, and
bezel” on page 48 for details).
Statement 1:
76
Hardware Maintenance Manual: xSeries 232, Type 8668