IBM N7800 Hardware And Service Manual page 121

If...
Neither node is in takeover mode
The partner node took over the target node
The target node took over the partner node
3. Take over the target node by entering the following command from the partner
node's console:
cf takeover
4. If you are not already grounded, properly ground yourself.
5. Turn off the power supplies and disconnect the power on the target node.
If your system uses...
AC power
DC power
Shutting down the node in a stand-alone system:
For a node that is not configured with a high-availability (HA) partner, you must
perform a clean shutdown (ensuring that all data has been written to disk) and
disconnect the power supplies.
Procedure
1. Halt the system from the system console:
halt
Attention: You must perform a clean system shutdown before replacing
system components to avoid losing unwritten data in the NVRAM. The
NVRAM adapter has a red LED that blinks if there is unwritten data in the
NVRAM. If this LED is flashing red after you enter the halt command, reboot
your system and try halting it again.
2. If you are not already grounded, properly ground yourself.
3. Turn off the power supplies and unplug both power cords from the power
source:
If your system uses...
AC power supplies
DC power supplies
Then...
Shut down the target node by entering the
halt command from the target node's
console.
Note: You can also run the cf takeover
command from the partner node's console.
The target node is in a state where you can
begin removing it from the system chassis.
1. Correct the problem that caused the
takeover.
2. Run the cf giveback command from the
target node console.
3. Shut down the target node by entering
the halt command from the target node's
console.
Then...
Unplug the power cords from the power
source, and then remove the power cords.
Remove the power at the DC source.
Remove the DC wires, if necessary.
Then...
Unplug the power cords from the power
source, and then remove the power cords.
Remove the power at the DC source, and
remove the DC wires, if necessary.
Chapter 5. Replacing N7000 series system devices
95