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If the system-level diagnostics tests...
Completing the replacement process
After you replace the part, you can return the failed part to Lenovo, as described in the RMA instructions
shipped with the kit. Contact technical support at
additional help with the replacement procedure.
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 reinstall the controller module.
All other components in the system must be functioning properly; if not, you must contact technical support.
Shutting down the degraded controller
You can shut down or take over the degraded controller using different procedures, depending on the
storage system hardware configuration.
Shutting down the controller
To shut down the degraded 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 for the degraded controller's
storage.
Before you begin
• If you have a cluster with more than two controllers, check the health and Epsilon from advanced mode:
cluster show -epsilon*
• If the cluster is not in quorum or a controller that is not the degraded controller shows
and health, correct the issue before proceeding to the next step.
Step 1.
If Epsilon resides in the degraded controller:
a.
Remove Epsilon from the degraded controller:
Then...
when prompted to get to the Boot
Ctrl-C
menu:
• If you removed the controller in the
previous step, fully seat the controller
module you are servicing in the chassis.
The controller module boots up when
fully seated.
5. Select Boot to maintenance mode by
typing:
boot_diags
6. Repeat all of the steps necessary to
perform the system level diagnostics for
the cache module.
7. Exit Maintenance mode by entering the
following command:
After you issue the command, wait until
the system stops at the LOADER prompt.
8. Rerun the system-level diagnostic test.
Lenovo Data Center Support
cluster modify -node impaired_node -epsilon false
Chapter 4
halt
if you need the RMA number or
for eligibility
false
.
Hardware replacement procedures
23
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