Hard disk drive activity LED
When this LED is flashing, it indicates that a hard disk drive is in use.
Hot-swap hard disk drive activity LED (some models)
On
Hot-swap hard disk drive status LED (some models)
On
When the drive is connected to an optional ServeRAID controller, a slowly flashing (one flash per second) amber status LED indicates that the drive is being rebuilt. When the LED is flashing rapidly (three flashes per second), it indicates that the controller is identifying the drive.
Power-on LED
When this LED is lit and not flashing, it indicates that the server is turned on. When this LED is flashing, it indicates that the server is off and still connected to an ac power source (standby mode).
Power-control button
Press this button to turn the server on and off manually.
System-error LED
When this amber LED is lit, it indicates that a system error has occurred. A LED on the system board might also be lit to help isolate the error. Detailed troubleshooting information is in the Hardware Maintenance Manual and Troubleshooting Guide on the IBM xSeries Documentation CD.
USB ports
Connect a USB device to these connectors.
Ethernet link status LED
This LED is on the Ethernet connector on the back of the server. When this LED is lit, it indicates that there is an active connection on the Ethernet port.
Ethernet transmit/receive activity LED
This LED is on the Ethernet connector. When this LED is lit, it indicates that there is activity between the server and the network.