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EonStor A12U/A08U-G2421 Installation and Hardware Reference Manual 

Green 

ON: Indicates controller is active and 

operating normally. 

FLASHING: Indicates controller 

initialization is taking place. 

OFF: Controller is not ready for operation. 

Green 

FLASHING: Activities on the host ports. 

OFF: No activities on the host ports. 

Green 

FLASHING: Activities on the drive side. 

OFF: No activities on the drive side. 

Amber 

ON: Indicates that data is currently being 

cached in memory or is being held up by 

the BBU during a system power loss. 

  

Amber 

ON: Indicates the BBU has failed and 

cannot sustain cached data. 

OFF: Indicates the BBU can sustain cached 

data in memory. 

FLASHING: The BBU is charging. 

(NOTE: The BBU is considered as an 

optional module.  If a BBU has not been 

installed, then this LED is always off).   

Table 3-2: Controller Module LED Definitions 

Both A12U and A08U subsystems come with a RS-232C audio jack serial port that 

can be used to assign a permanent IP to the subsystems. After a permanent IP address 

has been assigned, an Ethernet cable can be used to connect the RJ-45 Ethernet port 

to a network hub or router. This enables you to manage your subsystem locally or 

remotely over TCP/IP. See Figure 3- 2 for the locations of the two LED indicators 

on Ethernet port. Refer to Table 3-3 for the LED definitions.  

 
 
 

Figure 3- 2: Ethernet Port Indicators 

Link Status 

Activity