IBM N7800, Hardware And Service Manual

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Replacing a DIMM in an N7000 series system
To replace a DIMM in the system, you must perform a specific sequence of tasks.
About this task
v
You can use this procedure with all versions of Data ONTAP supported by your
system.
v
This procedure refers to HA pairs, which in releases prior to Data ONTAP 8.0
were called
active/active configurations .
v All other components in the system must be functioning properly; if not, contact
technical support.
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
on) by entering the following command at the system console of either node:
For... Issue the command...
7-Mode
cf status
Cluster-Mode
storage failover show
2. Take one of the following actions, depending on the result of the
storage
failover show
or
cf status
command:
If... Then...
Neither node is in takeover mode Go to the next step in this procedure.
The partner node took over the target node The target node is in a state where you can
shut it down; go to the next step in this
procedure.
The target node took over the partner node
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.
3.
Take over the target node by entering the following command from the partner
node's console:
For... Issue the command...
7-Mode cf takeover
Cluster-Mode storage failover takeover -bynode node
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IBM System Storage: N7000 Series Hardware and Service Guide