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AFF A300 - Replacing the NVMEM battery.pdf
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AFF A300 - Replacing the NVMEM battery.pdf
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AFF A300 systems
Replacing the NVMEM battery
To replace an NVMEM battery in the system, you must remove the controller module from the system, open it, replace the
battery, and close and replace the controller module.
About this task
All other components in the system must be functioning properly; if not, you must contact technical support.
Steps
1. Shutting down the impaired controller on page 1
2. Opening the controller module on page 3
3. Replacing the NVMEM battery on page 4
4. Reinstalling the controller on page 6
5. Running system-level diagnostics on page 6
6. Switching back aggregates in a two-node MetroCluster configuration on page 9
7. Completing the replacement process on page 10
Shutting down the impaired controller
You can shut down or take over the impaired controller using different procedures, depending on the storage system hardware
configuration.
Shutting down the node
To shut down the impaired node, you must determine the status of the node and, if necessary, take over the node so that the
healthy node continues to serve data from the impaired node storage.
Before you begin
• If you have a cluster with more than two nodes, it must be in quorum. If the cluster is not in quorum or a healthy node shows
false for eligibility and health, you must correct the issue before shutting down the impaired node.
ONTAP 9 System Administration Reference
Steps
1. If the impaired node is part of an HA pair, disable automatic giveback from the console of the healthy node:
storage failover modify -node local -auto-giveback false
2. Take the impaired node to the LOADER prompt:
If the impaired node is displaying... Then...
The LOADER prompt Go to the next step.
Waiting for giveback... Press Ctrl-C, and then respond y when prompted.
1
215-11082_2019-11_en-us November 2019 Copyright
©
2019 NetApp, Inc. All rights reserved.
Web: www.netapp.com • Feedback: doccomments@netapp.com
If the impaired node is displaying... Then...
System prompt or password prompt
(enter system password)
Take over or halt the impaired node:
• For an HA pair, take over the impaired node from the healthy node:
storage failover takeover -ofnode impaired_node_name
When the impaired node shows Waiting for giveback..., press Ctrl-C, and then
respond y.
3. If the system has only one controller module in the chassis, turn off the power supplies, and then unplug the impaired node's
power cords from the power source.
Shutting down a node in a two-node MetroCluster configuration
To shut down the impaired node, you must determine the status of the node and, if necessary, switch over the node so that the
healthy node continues to serve data from the impaired node storage.
About this task
You must leave the power supplies turned on at the end of this procedure to provide power to the healthy node.
Steps
1. Check the MetroCluster status to determine whether the impaired node has automatically switched over to the healthy node:
metrocluster show
2. Depending on whether an automatic switchover has occurred, proceed according to the following table:
If the impaired node... Then...
Has automatically switched over Proceed to the next step.
Has not automatically switched over Perform a planned switchover operation from the healthy node:
metrocluster switchover
Has not automatically switched over,
you attempted switchover with the
metrocluster switchover
command, and the switchover was
vetoed
Review the veto messages and, if possible, resolve the issue and try again. If you are unable to
resolve the issue, contact technical support.
3. Resynchronize the data aggregates by running the metrocluster heal -phase aggregates command from the
surviving cluster.
Example
controller_A_1::> metrocluster heal -phase aggregates
[Job 130] Job succeeded: Heal Aggregates is successful.
If the healing is vetoed, you have the option of reissuing the metrocluster heal command with the -override-vetoes
parameter. If you use this optional parameter, the system overrides any soft vetoes that prevent the healing operation.
4. Verify that the operation has been completed by using the metrocluster operation show command.
2
AFF A300 systems: Replacing the NVMEM battery
Example
controller_A_1::> metrocluster operation show
Operation: heal-aggregates
State: successful
Start Time: 7/25/2016 18:45:55
End Time: 7/25/2016 18:45:56
Errors: -
5. Check the state of the aggregates by using the storage aggregate show command.
Example
controller_A_1::> storage aggregate show
Aggregate Size Available Used% State #Vols Nodes RAID Status
--------- -------- --------- ----- ------- ------ ---------------- ------------
...
aggr_b2 227.1GB 227.1GB 0% online 0 mcc1-a2 raid_dp, mirrored,
normal...
6.
Heal the root aggregates by using the metrocluster heal -phase root-aggregates command.
Example
mcc1A::> metrocluster heal -phase root-aggregates
[Job 137] Job succeeded: Heal Root Aggregates is successful
If the healing is vetoed, you have the option of reissuing the metrocluster heal command with the -override-vetoes
parameter. If you use this optional parameter, the system overrides any soft vetoes that prevent the healing operation.
7. Verify that the heal operation is complete by using the metrocluster operation show command on the destination
cluster:
Example
mcc1A::> metrocluster operation show
Operation: heal-root-aggregates
State: successful
Start Time: 7/29/2016 20:54:41
End Time: 7/29/2016 20:54:42
Errors: -
8. On the impaired controller module, disconnect the power supplies.
Opening the controller module
To access components inside the controller, you must first remove the controller module from the system and then remove the
cover on the controller module.
Steps
1. If you are not already grounded, properly ground yourself.
2. Loosen the hook and loop strap binding the cables to the cable management device, and then unplug the system cables and
SFPs (if needed) from the controller module, keeping track of where the cables were connected.
Opening the controller module
3
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