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)
