Powering off the rack
Before performing service on the rack, follow this procedure to prevent personal
injury and to avoid damaging the rack and the installed servers.
To power-off the IBM PC Server Rack:
1. Shut down and power-off all installed servers.
2. Power-off the server selector unit.
3. If a UPS system is installed in the rack, power-off the UPS system.
4. Disconnect power from the IBM PC Server Rack.
v If the rack is plugged into a wall-mounted power supply, disconnect the power
cord plug from the wall socket.
v If the power cord is wired directly into the installed location’s power supply,
open the rear door of the rack cabinet and disconnect the power plug from
the base of the power distribution unit.
General Checkout 3