Replacing a power supply
When a power supply fails, the storage system logs a warning message to the system console
indicating which power supply failed, and the fault LED on the operator display panel and the
fault LED on the failed power supply both illuminate.
Before you begin
• Disk shelf (IOM), disk drive, and if applicable, ACP firmware should be current on all disk
shelves in your system before adding new disk shelves, shelf FRU components, or SAS cables.
The best practice is to always have the most current versions of firmware on your system.
NetApp Downloads: Disk Shelf Firmware
NetApp Downloads: Disk Drive Firmware
Note: Do not revert firmware to a version that does not support the disk shelves, disk shelf
FRU components, or SAS cables in your system.
About this task
• If you are replacing more than one power supply, you must do so one at a time so that the disk
shelf maintains power.
• If you must remove all power supplies—leaving the disk shelf without any power supplies—
you must first power off the disk shelf.
• You must replace a power supply within two minutes of removal to minimize disruption to the
disk shelf's airflow.
Steps
1. Properly ground yourself.
2. Physically identify the failed power supply from the system console warning message and the
illuminated fault LED on the power supply.
3. Turn off the power supply and disconnect the power cables:
a. Turn off the power switch on the failed power supply.
b. Open the power cord retainer and unplug the power cord from the power supply.
c. Unplug the power cord from the power source.
4. Squeeze the latch on the cam handle until it releases, and then open the cam handle fully to
release the power supply from the midplane.
If you have a DS2246 or DS4486 disk shelf, a plastic flap within the now empty slot releases
to cover the opening and maintain air flow and cooling.
5. Use the cam handle to slide the power supply out of the disk shelf.
Attention: When removing a power supply, always
use two hands to support its weight.
6. With the cam handle in the open position, insert the replacement power supply into the disk
shelf, firmly pushing until the power supply engages the midplane.
Attention:
Do not use excessive force when sliding
the power supply into the disk shelf; you can
damage the connector.
7. Close the cam handle so that the latch clicks into the locked position and the power supply is
fully seated.
8. Reconnect the power supply cabling:
a. Reconnect the power cord to the power supply and the power source.
b. Secure the power cord to the power supply by using the power cord retainer.
DS4243, DS2246, DS4486, and DS4246 Installation and Service Guide 55
Replacing disk shelf components
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