Power Supply And Fan Unit Leds; Front Leds - IBM System Storage DS4000 EXP420 Installation, User And Maintenance Instructions

Power supply and fan unit LEDs

This section describes the primary LEDs on the storage expansion enclosure power
supply and fan units.
Figure 38. Power supply and fan unit LEDs
Table 16. Power supply and fan unit LEDs
Number LED
1
2
3
4

Front LEDs

This section describes the primary LEDs and controls on the front of the storage
expansion enclosure. The front view shows the following components:
v Front Frame - Metal cage frame containing global indicator lights and a link rate
v Drives - Up to 16 removable drives, which are numbered 1 through 16 from left
60
IBM System Storage DS4000 EXP420 Storage Expansion Enclosure: Installation, User's and Maintenance Guide
A
ESM
1
Power supply and fan unit
Power
Service Action Allowed
(OK to Remove)
Service Action Required
(Fault)
Direct Current Enabled
switch.
to right. When a drive is installed, the drive and tray slot designation is set
automatically. The hardware addresses are based on the enclosure ID switch
setting on the ESM and on the drive's physical location in the storage expansion
enclosure.
Note: The drives in your storage expansion enclosure might differ slightly in
appearance from those shown. The variation does not affect the function
of the drives.
4 3 2
2 3 4
Normal Status
On
Off
Off
On
1
B
ESM
exp81020
Problem Status
Off
On
On
Off