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4-5

Environmental Monitoring

Disk Drive Carrier LEDs

Each disk drive carrier in a disk shelf has two LED indicators on the front (see

Figure 4-3). These LED indicators are driven by the VEM.

Figure 4-3. LEDs On Disk Drive Carrier

The disk drive LEDs function as follows:

• The Green LED on the top is the device activity indicator. It is on or flashing

when the disk is active.

• The Red LED on the bottom is the device fault indicator. This LED is

steadily on when the disk has failed.

Table 4-1 shows how to interpret the LEDs.

Device Fault LED (RED)

Device Activity LED (GREEN)

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 50 51

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