HP Integrity rx4640 Server - Manual (Page 43)

Diagnosing array problems 43
Cache module LEDs
Item 1
(amber
LED) Item 2
(green LED) Interpretation
-- Steady glow The cache batteries are being charged.
-- Fast blink The cache microcontroller is waiting for the
host controller to communicate.
Steady glow -- One of the following situations is occurring:
• There is a short circuit across the battery
terminals or within the battery pack.
• The host controller is updating the cache
microcontroller firmware.
Fast blink There is an open circuit across the battery
terminals or within the battery pack.
Slow blink
(once every
16 seconds) This display pattern might occur after the
system is powered down. It indicates that the
cache contains data that has not yet been
written to the drives. Restore system power as
soon as possible to prevent data loss. (The
battery lifetime depends on the cache module
size. For further information, refer to the
controller QuickSpecs on the HP website
(
http://www.hp.com ).)