Shutting Down The Node - IBM N7800 Hardware And Service Manual

Shutting down the node

You shut down a node using different procedures, depending on whether it is a
stand-alone system or part of an HA pair.
Shutting down a node in an HA pair
To shut down the node you must determine the status of the node and, if
necessary, take over the node so that the partner continues to serve data from the
node's storage.
Procedure
1. Check the status of the target node (the node you want to perform maintenance
2. Take one of the following actions, depending on the result of the storage
3. Take over the target node by entering the following command from the partner
4.
5. Turn off the power supplies and disconnect the power on the target node.
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IBM System Storage: N7000 Series Hardware and Service Guide
on) by entering the following command at the system console of either node:
For...
7-Mode
Cluster-Mode
failover show or cf status command:
If...
Neither node is in takeover mode
The partner node took over the target node
The target node took over the partner node
node's console:
For...
7-Mode
Cluster-Mode
If you are not already grounded, properly ground yourself.
If your system uses...
AC power
DC power
Issue the command...
cf status
storage failover show
Then...
Go to the next step in this procedure.
The target node is in a state where you can
shut it down; go to the next step in this
procedure.
1. Correct the problem that caused the
takeover.
2. Run the storage failover giveback or
cf giveback command from the target
node console.
3. Go back to the beginning of this
procedure.
Issue the command...
cf takeover
storage failover takeover -bynode node
Then...
Unplug the power cords from the power
source, and then remove the power cords.
Remove the power at the DC source, and
then remove the DC wires, if necessary.