Controller overview

Each controller canister contains a controller card, a battery, and an optional host interface card (HIC). You can add a second controller to a simplex configuration or replace a failed controller.

Add second controller

You can add a second controller canister to the simplex version of the following controller shelves:
  • E2812 controller shelf
  • E2824 controller shelf
  • EF280 flash array

The figures show an example controller shelf before adding a second controller (one controller canister and a controller blank) and after adding a second controller (two controller canisters).





Note: The figures show example controller canisters; the host ports on your controller canisters might be different.

Replace controller

When you replace a failed controller canister, you must remove the battery and HIC, if one is installed, from the original controller canister, and install them in the replacement controller canister.

You can determine if you have a failed controller canister in two ways:

Attention LED

Note: The figure shows an example controller canister; the host ports on your controller canister might be different.