
6-1
CHAPTER
6
Checking LEDs
This chapter describes the front and back-panel LEDs, which display the operating
status of all drives and modules. Topics covered in this chapter are:
■ “LEDs When The Array Is First Powered On” on page 6-1
■ “Front-Panel LEDs” on page 6-2
■ “Drive LED Status” on page 6-4
■ “Correcting SES or PLD Firmware Version Conflicts” on page 6-4
■ “Back-Panel LEDs” on page 6-5
■ “I/O Controller Module LEDs” on page 6-5
■ “I/O Expansion Module LEDs” on page 6-8
■ “Power Supply and Fan Module LEDs” on page 6-9
For troubleshooting flowcharts related to LEDs, see “Troubleshooting Flowcharts” on
page 8-11.
6.1 LEDs When The Array Is First Powered On
With the array powered up but not connected to a server, you should see the LED
conditions described in Table 6-1.
Note – Whenever media scan is running on a drive, its front-panel LED flashes green.
It is normal for almost all front-panel drive LEDs to flash green unless media scanning
is terminated. For more information, refer to the SANnet II Family RAID Firmware
User’s Guide.
Table 6-1 Front-Panel LED Status When Array Is First Powered On
Drive LEDs Blinking green
Chassis ear LEDs Solid green
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