Interpret Controller Module Leds; Figure 37 Controller Module Leds Applicable To All Variations - Seagate Exos X 4006 Series Hardware Installation And Maintenance Manual

Interpret controller module LEDs

There are two redundant controller modules (CMs) that use a series of LEDs to reflect host connectivity status. You can
monitor the LEDs from the rear panel area to determine system status in combination with the user interface content. You
cannot mix controller types when daisy-chaining controllers.
In the case of a fault condition, identified in the state column with an asterisk (*), troubleshoot the fault and take appropriate
corrective action.
LED Type
Hardware normal Green
Hardware fault
Identify
OK to remove
Cache status
Additional port LEDs on the CM relate to host connectivity and network activity, depending on the controller type.
= SAS 4-port
12Gb/s
Color State
On
Flashing
Off
On*
Amber
Off
On
Blue
Off
White On
Off
On
Fast flash (1s on, 1s off)
Green Slow flash (3s on, 1s off)
Off

Figure 37 Controller module LEDs applicable to all variations

Status
CM functioning properly
Part of sequence as CM comes online, on standby
CM power is off, CM is offline, or CM has a fault condition
CM hardware fault
CM functioning properly
Unit identification (UID) active
Normal state, no query for UID active
Ready for removal, the cache is clear
Do not remove the CM, cache still contains unwritten data
Cache contains unwritten data, CM functioning properly
Cache is active, cache flush in progress
Cache self-refresh in progress after cache flush
Cache is clear
System is coming online
Chapter 6 Operation of 2U enclosures
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