HP 273914-B21 Smart Array 6400 Series Controllers User Guide - Page 53

Cache module LEDs Diagnosing array problems 53 Item 1 (amber LED) --- Steady glow Fast blink Slow blink (once every 16 seconds) Item 2 Interpretation (green LED) Steady glow Fast blink -- The cache batteries are being charged. The cache microcontroller is waiting for the host controller to communicate. 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. There is an open circuit across the battery terminals or within the battery pack. 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).)