Chapter 7 Operation of 5U enclosures 53
LED Type Color State Status
Hardware normal Green
On CM functioning properly
Flashing Part of sequence as CM comes online, on standby
Off CM power is off, CM is offline, or CM has a fault condition
Hardware fault Amber
On* CM hardware fault
Off CM functioning properly
Identify Blue
On Unit identification (UID) active
Off Normal state, no query for UID active
OK to remove White On Ready for removal, the cache is clear
Off Do not remove the CM, cache still contains unwritten data
Cache status Green
On Cache contains unwritten data, CM functioning properly
Fast flash (1s on, 1s
off)
Cache is active, cache flush in progress
Slow flash (3s on, 1s
off)
Cache self-refresh in progress after cache flush
Off
Cache is clear
System is coming online
Figure 44 Controller module LEDs applicable to all variations
Additional port LEDs on the CM relate to host connectivity and network activity, depending on the controller
type.