Each 12-drive or 24-drive controller shelf or drive shelf has two power-fan canisters that supply a redundant power source and adequate cooling.
The following shelves contain two power supplies (power-fan canisters):
- DE2000 controller shelf
- DE4000 controller shelf (2U)
- DE6000 controller shelf (2U)
- DE120S drive shelf
- DE240S drive shelf
The following figure shows an example 2U controller shelf with two power supplies (power-fan canisters). The DE120S and DE240S drive shelves are identical, but they include I/O modules (IOMs) instead of controller canisters.
Controller
shelf with two power supplies (power-fan canisters) below the controller
canisters.