Each 24-drive controller shelf or drive shelf includes two power supplies with integrated fans. These are
referred to as power-fan canisters in SANtricity System Manager. If a power-fan canister fails, you must replace
it as soon as possible to ensure that the shelf has a redundant power source and adequate cooling.
Shelf types for a power supply
You can replace a power supply in the following shelves:
• E5724 controller shelf
• DE224C drive shelf
The following figure shows an example E5724 controller shelf with two power supplies (power-fan canisters).
The DE224C drive shelves are identical, but they include I/O modules (IOMs) instead of controller canisters.
(1) Controller shelf with two power supplies (power-fan canisters) below the controller canisters.
The Replace power supply topics do not describe how to replace a failed power-fan canister in a DE1600 or
DE5600 drive tray, which might be connected to the E5700 or E2800 controller shelves. For instructions for
those drive tray models, refer to
Replacing a Power-Fan Canister in the DE1600 Drive Tray or the DE5600
Drive Tray
.
Requirements for replacing a power supply
If you plan to replace a power supply, keep the following requirements in mind.
• You must have a replacement power supply (power-fan canister) that is supported for your controller shelf
or drive shelf model.
• You must have an ESD wristband, or you have taken other antistatic precautions.
• You can replace a power supply (power-fan canister) while your storage array is powered on and
performing host I/O operations, as long as the following conditions are true:
◦ The second power supply (power-fan canister) in the shelf has an Optimal status.
◦ The OK to remove field in the Details area of the Recovery Guru in SANtricity System Manager
displays Yes, indicating that it is safe to remove this component.
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