IBM 887022X Maintenance Manual - Page 14

Server controls and indicators The following section identifies the controls and indicators on the front and rear of the server. Front view AC power LED Power-on LED Power-control button Reset button Power supply latch DC power LED Hard disk drive activity LED Hard disk drive status LED USB port Diskette drive activity LED Diskette eject button Diskette drive eject button System-error LED (amber) Information LED (amber) SCSI activity LED (green) Locator LED (blue) DVD-ROM drive eject button DVD eject button DVD-ROM drive activity LED Figure 2. Front view of xSeries 445 AC and DC power LED: Each hot-swap power supply has an ac power LED and a dc power LED. During typical operation, both the ac and dc power LEDs are lit. For any other combination of LEDs, see "Power LED errors" on page 240. Hard disk drive activity LED: When this green LED is on, it indicates that the hard disk drive is in use. Note: On some server models, each hot-swap hard disk drive has an activity LED. When this LED is flashing, it indicates that the drive is in use. Hard disk drive status LED: When the drive is connected to the integrated SCSI controller with RAID capabilities, a flashing status LED indicates that the drive is a secondary drive in a mirrored pair and the drive is being synchronized. When the drive is connected to an optional ServeRAID controller, a slowly flashing (one flash per second) 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. 4 xSeries 445 Type 8870: Hardware Maintenance Manual and Troubleshooting Guide