12 Gb/s controller module LEDs
The diagrams with tables that immediately follow provide descriptions for the different controller modules that can be installed
into the rear panel of the controller enclosures.
NOTE: Consider the following when viewing the controller module diagrams on the following pages:
● In each diagram, the controller module is oriented for insertion into the top slot (A) of 2U enclosures. When oriented for use
in the bottom slot (B) of 2U enclosures, the controller module labels appear upside down.
● In each diagram, the controller module is oriented for insertion into either slot of 5U84 enclosures.
● Alternatively, you can configure the 2U controller enclosure with a single controller module. Install the controller module in
slot A, and install a blank plate in slot B.
Figure 33. ME5 Series controller module
Table 14. Common controller module LEDs
LED Description Color Status
Hardware normal Green On—Controller module is functioning properly
Flashing—Part of standby sequence as the controller
module comes online
Off—Controller module power is off, controller module is
offline, or controller module has a fault condition
Hardware fault Amber On—Controller module hardware fault
Off—Controller module functioning properly
OK to remove White On—Ready for removal, the cache is clear
Off—Do not remove the controller module, cache still
contains unwritten data
Identify Blue On—Unit identification (UID) is active
Off—Normal state, UID is not active
Cache status Green On—Cache contains unwritten data, controller module is
functioning properly
Fast flash (1s:1s)—Cache is active, cache flush in progress
Slow flash (3s: 1s)—Cache self-refresh in progress after
cache flush
Off—Cache is clear or system is coming online
Ethernet management port
speed
Amber On—1000Base-T negotiated rate
Off—10/100Base-T negotiated rate
ACT Ethernet management port
link activity
Green On—Ethernet link is up
Off—Ethernet link is down
12 Gb/s SAS expansion
port status
Green On—Connected, link is up
Green or amber Flashing—Link activity
Amber On—Connected, partial link is up
32 Troubleshooting and problem solving
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