Maintain
Maintain AFF A70, AFF A90 hardware
For the AFF A70, AFF A90 storage systems, you can perform maintenance procedures
on the following components.
Boot media
The boot media stores a primary and secondary set of boot image files that the system uses when it boots.
Chassis
The chassis is the physical enclosure housing all the controller components such as the controller/CPU unit,
power supply, and I/O.
Controller
A controller consists of a board, firmware, and software. It controls the drives and implements the ONTAP
functions.
DIMM
You must replace a DIMM (dual in-line memory module) when a memory mismatch is present, or you have a
failed DIMM.
Drive
A drive is a device that provides the physical storage media for data.
Fan
The fan cools the controller.
NVRAM
The NVRAM (Non-Volatile Random Access Memory) is a module that allows the controller to protect and save
in-flight data if the system loses power. The system ID resides in the NVRAM module. When replaced, the
controller assumes the new system ID from the replacement NVRAM module.
NV battery
The NVRAM battery is responsible for providing power to the NVRAM module while data in-flight is being
destaged to flash memory after a power loss.
I/O module
The I/O module (Input/Output module) is a hardware component that acts as an intermediary between the
controller and various devices or systems that need to exchange data with the controller.
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