Replace the real-time clock battery
You replace the real-time clock (RTC) battery in the controller module so that your system’s services and applications that depend on accurate time synchronization continue to function.
You can use this procedure with all versions of ONTAP supported by your system
All other components in the system must be functioning properly; if not, you must contact technical support.
Step 1: Shut down the impaired controller
You can shut down or take over the impaired controller using different procedures, depending on the storage system hardware configuration.
To shut down the impaired controller, you must determine the status of the controller and, if necessary, take over the controller so that the healthy controller continues to serve data from the impaired controller storage.
If you are using NetApp Storage Encryption, you must have reset the MSID using the instructions in the “Returning SEDs to unprotected mode” section of the ONTAP 9 NetApp Encryption Power Guide.
If you have a SAN system, you must have checked event messages (
event log show) for impaired controller SCSI blade.
Each SCSI-blade process should be in quorum with the other nodes in the cluster. Any issues must be resolved before you proceed with the replacement.
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 controller shows false for eligibility and health, you must correct the issue before shutting down the impaired controller; see the Administration overview with the CLI.
If you have a MetroCluster configuration, you must have confirmed that the MetroCluster Configuration State is configured and that the nodes are in an enabled and normal state (
metrocluster node show).
If AutoSupport is enabled, suppress automatic case creation by invoking an AutoSupport message:
system node autosupport invoke -node * -type all -message MAINT=number_of_hours_downh
The following AutoSupport message suppresses automatic case creation for two hours:
cluster1:*> system node autosupport invoke -node * -type all -message MAINT=2h
Disable automatic giveback from the console of the healthy controller:
storage failover modify –node local -auto-giveback false
When you see Do you want to disable auto-giveback?, enter
Take the impaired controller to the LOADER prompt:
If the impaired controller is displaying… Then…
The LOADER prompt
Go to Remove controller module.
Waiting for giveback…
Press Ctrl-C, and then respond
System prompt or password prompt (enter system password)
Take over or halt the impaired controller from the healthy controller:
storage failover takeover -ofnode impaired_node_name
When the impaired controller shows Waiting for giveback…, press Ctrl-C, and then respond
To shut down the impaired controller, you must determine the status of the controller and, if necessary, switch over the controller so that the healthy controller continues to serve data from the impaired controller storage.
If you are using NetApp Storage Encryption, you must have reset the MSID using the instructions in the "Return a FIPS drive or SED to unprotected mode" section of NetApp Encryption overview with the CLI.
You must leave the power supplies turned on at the end of this procedure to provide power to the healthy controller.
Check the MetroCluster status to determine whether the impaired controller has automatically switched over to the healthy controller:
Depending on whether an automatic switchover has occurred, proceed according to the following table:
If the impaired controller… Then…
Has automatically switched over
Proceed to the next step.
Has not automatically switched over
Perform a planned switchover operation from the healthy controller:
Has not automatically switched over, you attempted switchover with the
metrocluster switchovercommand, 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.
Resynchronize the data aggregates by running the
metrocluster heal -phase aggregatescommand from the surviving cluster.
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 healcommand with the
-override-vetoesparameter. If you use this optional parameter, the system overrides any soft vetoes that prevent the healing operation.
Verify that the operation has been completed by using the metrocluster operation show command.
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: -
Check the state of the aggregates by using the
storage aggregate showcommand.
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...
Heal the root aggregates by using the
metrocluster heal -phase root-aggregatescommand.
mcc1A::> metrocluster heal -phase root-aggregates [Job 137] Job succeeded: Heal Root Aggregates is successful
metrocluster healcommand with the -override-vetoes parameter. If you use this optional parameter, the system overrides any soft vetoes that prevent the healing operation.
Verify that the heal operation is complete by using the
metrocluster operation showcommand on the destination cluster:
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: -
On the impaired controller module, disconnect the power supplies.
Step 2: Remove 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.
If you are not already grounded, properly ground yourself.
Unplug the cables from the impaired controller module, and keep track of where the cables were connected.
Slide the orange button on the cam handle downward until it unlocks.
Cam handle release button
Rotate the cam handle so that it completely disengages the controller module from the chassis, and then slide the controller module out of the chassis.
Make sure that you support the bottom of the controller module as you slide it out of the chassis.
Place the controller module lid-side up on a stable, flat surface, press the blue button on the cover, slide the cover to the back of the controller module, and then swing the cover up and lift it off of the controller module.
Controller module cover locking button
Step 3: Replace the RTC battery
To replace the RTC battery, you must locate the failed battery in the controller module, remove it from the holder, and then install the replacement battery in the holder.
If you are not already grounded, properly ground yourself.
Locate the RTC battery.
RTC battery housing
Gently push the battery away from the holder, rotate it away from the holder, and then lift it out of the holder.
Note the polarity of the battery as you remove it from the holder. The battery is marked with a plus sign and must be positioned in the holder correctly. A plus sign near the holder tells you how the battery should be positioned.
Remove the replacement battery from the antistatic shipping bag.
Locate the empty battery holder in the controller module.
Note the polarity of the RTC battery, and then insert it into the holder by tilting the battery at an angle and pushing down.
Visually inspect the battery to make sure that it is completely installed into the holder and that the polarity is correct.
Reinstall the controller module cover.
Step 4: Reinstall the controller module and set time/date
After you replace a component within the controller module, you must reinstall the controller module in the system chassis, reset the time and date on the controller, and then boot it.
If you have not already done so, close the air duct or controller module cover.
Align the end of the controller module with the opening in the chassis, and then gently push the controller module halfway into the system.
Do not completely insert the controller module in the chassis until instructed to do so.
Recable the system, as needed.
If you removed the media converters (QSFPs or SFPs), remember to reinstall them if you are using fiber optic cables.
If the power supplies were unplugged, plug them back in and reinstall the power cable retainers.
Complete the reinstallation of the controller module:
With the cam handle in the open position, firmly push the controller module in until it meets the midplane and is fully seated, and then close the cam handle to the locked position.
Do not use excessive force when sliding the controller module into the chassis to avoid damaging the connectors.
If you have not already done so, reinstall the cable management device.
Bind the cables to the cable management device with the hook and loop strap.
Reconnect the power cables to the power supplies and to the power sources, and then turn on the power to start the boot process.
Halt the controller at the LOADER prompt.
Reset the time and date on the controller:
Check the date and time on the healthy node with the
At the LOADER prompt on the target node, check the time and date.
If necessary, modify the date with the
set date mm/dd/yyyycommand.
If necessary, set the time, in GMT, using the
set time hh:mm:sscommand.
Confirm the date and time on the target node.
At the LOADER prompt, enter
byeto reinitialize the PCIe cards and other components and let the node reboot.
Return the node to normal operation by giving back its storage:
storage failover giveback -ofnode impaired_node_name
If automatic giveback was disabled, reenable it:
storage failover modify -node local -auto-giveback true
Step 5: Switch back aggregates in a two-node MetroCluster configuration
After you have completed the FRU replacement in a two-node MetroCluster configuration, you can perform the MetroCluster switchback operation. This returns the configuration to its normal operating state, with the sync-source storage virtual machines (SVMs) on the formerly impaired site now active and serving data from the local disk pools.
This task only applies to two-node MetroCluster configurations.
Verify that all nodes are in the
metrocluster node show
cluster_B::> metrocluster node show DR Configuration DR Group Cluster Node State Mirroring Mode ----- ------- -------------- -------------- --------- -------------------- 1 cluster_A controller_A_1 configured enabled heal roots completed cluster_B controller_B_1 configured enabled waiting for switchback recovery 2 entries were displayed.
Verify that resynchronization is complete on all SVMs:
metrocluster vserver show
Verify that any automatic LIF migrations being performed by the healing operations were completed successfully:
metrocluster check lif show
Perform the switchback by using the
metrocluster switchbackcommand from any node in the surviving cluster.
Verify that the switchback operation has completed:
The switchback operation is still running when a cluster is in the
cluster_B::> metrocluster show Cluster Configuration State Mode -------------------- ------------------- --------- Local: cluster_B configured switchover Remote: cluster_A configured waiting-for-switchback
The switchback operation is complete when the clusters are in the
cluster_B::> metrocluster show Cluster Configuration State Mode -------------------- ------------------- --------- Local: cluster_B configured normal Remote: cluster_A configured normal
If a switchback is taking a long time to finish, you can check on the status of in-progress baselines by using the
metrocluster config-replication resync-status showcommand.
Reestablish any SnapMirror or SnapVault configurations.
Step 6: Return the failed part to NetApp
Return the failed part to NetApp, as described in the RMA instructions shipped with the kit. See the Part Return & Replacements page for further information.