Symptom
An alert box with this message appears:
"Your server's redundant power supply requires attention. It is recommended that the power supply be replaced to maintain system reliability. Contact you Apple service provider for details."
Figure 1 Redundant power supply alert
Solution
This alert box is likely to appear when server computers have no additional PCI cards or hard drives installed in them. In this configuration, there is not enough current draw on the +5 V line and the power supply reports this low current situation to the Mac OS. This, however, does not indicate there is an issue with the power supply.
If this alert appears on your server computer, and it is otherwise working normally, you may ignore this alert. Installing additional PCI cards or hard drives will provide additional load against the power supply and remove the likelihood that the alert box will appear.
If this is not possible, contact your Apple Authorized Service Provider for additional details.