NVRAM module or the DIMMs inside the NVRAM module. To replace a failed NVRAM
module, you must remove it from the chassis, move the DIMMs to the replacement
module, and install the replacement NVRAM module into the chassis.
To replace and NVRAM DIMM, you must remove the NVRAM module from the chassis, replace the failed
DIMM in the module, and then reinstall the NVRAM module.
About this task
Because the system ID is derived from the NVRAM module, if replacing the module, disks belonging to the
system are reassigned to a new system ID.
Before you begin
• All disk shelves must be working properly.
• If your system is in an HA pair, the partner controller must be able to take over the controller associated
with the NVRAM module that is being replaced.
• This procedure uses the following terminology:
◦ The impaired controller is the controller on which you are performing maintenance.
◦ The healthy controller is the HA partner of the impaired controller.
• This procedure includes steps for automatically reassigning disks to the controller module associated with
the new NVRAM module. You must reassign the disks when directed to in the procedure. Completing the
disk reassignment before giveback can cause issues.
• You must replace the failed component with a replacement FRU component you received from your
provider.
• You cannot change any disks or disk shelves as part of this procedure.
Step 1: Shut down the impaired controller
Steps
Shut down or take over the impaired controller using one of the following options.
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