Installation guide
INTRODUCTION
10
1.3.2 SAS RAID Subsystem Rear View
● 2U-12 bays SAS RAID Subsystem Rear View
● 3U-16 bays SAS RAID Subsystem Rear View
LED Normal status Problem Indication
Blue LED
(Activity)
When the activity LED 
is illuminated, there is 
I/O activity on that disk 
drive. When the LED is 
dark; there is no activity
on that disk drive.
N/A
Green/Red LED
(Power/Fault)
When the power LED 
(green) is solid illumi-
nated and fault LED (red)  
is off, that disk is present 
and status normal.
When the fault LED is 
solid illuminated there is 
no disk present. 
When the fault LED (red) is slow 
blinking (2 times/sec), that disk 
drive has failed and should be
hot-swapped immediately. 
When the activity LED (blue) is 
illuminated and fault LED (red) 
is fast blinking (10 times/sec) 
there is rebuilding activity on 
that disk drive.










