NetApp ASA C Series Install page 222

== Drive
A drive is a device that provides the physical storage media for data.
== Fan
The fan cools the controller.
== NVDIMM
The NVDIMM (non-volatile dual in-line memory module) manages the data transfer from the volatile
memory to the non-volatile storage, and maintains data integrity in the event of a power loss or system
shutdown.
== NVDIMM battery
A NVDIMM battery is responsible for maintaining power to the NVDIMM module.
== PCIe card
A PCIe (peripheral component interconnect express) card is an expansion card that plugs into the PCIe
slot on the motherboard.
== Power supply
A power supply provides a redundant power source in a controller shelf.
== Real-time clock battery
A real time clock battery preserves system date and time information if the power is off.
= Boot media
= Overview of boot media replacement - ASA C800
:icons: font
:relative_path: ./asa-c-800/
:imagesdir: /tmp/d20231020-12297-25s5m0/source/./asa-c-250/../media/
• You must replace the failed component with a replacement FRU component you received from your
provider.
• It is important that you apply the commands in these steps on the correct controller:
◦ The impaired controller is the controller on which you are performing maintenance.
◦ The healthy controller is the HA partner of the impaired controller.
= Check onboard encryption keys - ASA C800
:icons: font
:relative_path: ./asa-c-800/
:imagesdir: /tmp/d20231020-12297-25s5m0/source/./asa-c-250/../media/
Prior to shutting down the impaired controller and checking the status of the onboard
encryption keys, you must check the status of the impaired controller, disable
automatic giveback, and check which version of ONTAP is running on the system.
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