For the DE6400 and DE6600 storage systems, you can perform maintenance procedures on the following components.

Video instructions: Access video demos to learn more about DE6400 and DE6600 system maintenance procedures at Lenovo ThinkSystem DE6400 and DE6600 Maintenance.


A battery is included with a controller and preserves cached data if the AC power fails.


A controller consists of a board, firmware, and software. It controls the drives and implements the ThinkSystem System Manager functions.


You must replace a DIMM (dual in-line memory module) when a memory mismatch is present, or you have a failed DIMM.


A drive is a device that provides the physical storage media for data.


Each DE6400 or DE6600 controller shelf or drive shelf includes five fans for cooling the controller.

Host interface cards (HICs)

A host interface card (HIC) must be installed within a controller canister. The DE6600 and DE6400 controllers include host ports on the optional HIC. Host ports that are built into the HIC are called HIC ports.

Host port protocol

You can convert the protocol of a host to a different protocol so that compatibility and communication can be established.

Power supplies

A power supply provides a redundant power source in a controller shelf.

SAS expansion cards

A SAS expansion card may be installed within a controller canister. DE6400 and DE6600 controllers support SAS expansion.