For the DE2000H or DE4000H storage system, you can perform maintenance procedures on the following components.
Access video demos to learn more about DE Series 2U system maintenance procedures: Lenovo ThinkSystem DE Series 2U enclosure
Each controller canister includes a battery that preserves cached data if the AC power fails.
A controller consists of a board, firmware, and software. It controls the drives and implements the System Manager functions.
Canisters consist of three different types: power-fan canisters (power supplies) that supply a redundant power source and adequate cooling in a 12-drive or 24-drive controller shelf or drive shelf; power canisters that are used for power redundancy in a 60-drive controller shelf or drive shelf; and fan canisters that are used for cooling the 60-drive controller shelf or drive shelf.
A drive is an electromagnetic mechanical device that provides the physical storage media for data.
Host interface cards (HICs)
A host interface card (HIC) can optionally be installed within a controller canister. The DE2000H or DE4000H controller includes built-in host ports on the controller card itself, as well as host ports on the optional HIC. Host ports that are built into the controller are called baseboard host ports. Host ports that are built into the HIC are called HIC ports.