Component Identification

39

 

 

 

 

 

 

Item

LED Description

Status

 

 

 

 

 

 

 

11

Logical I/O activity

Green = System is currently processing

 

 

 

 

logical requests from the host adapter.

 

 

 

 

Off = System is not processing any logical

 

 

 

 

requests.

 

 

 

 

 

 

 

12

SCSI bus 0 activity

Green = Outstanding requests exist on the

 

 

 

 

SCSI bus.

 

 

 

 

Off = No outstanding requests exist.

 

 

 

 

 

 

 

13

SCSI bus 1 activity

Green = Outstanding requests exist on the

 

 

 

 

SCSI bus.

 

 

 

 

Off = No outstanding requests exist.

 

 

 

 

 

 

 

14

Cache activity

Green = Cache activity is present.

 

 

 

 

Off = No cache activity is present.

 

 

 

 

Flashing green = Cache transfer is

 

 

 

 

pending.

 

 

 

 

 

 

 

15

Drive failure

Green = An array-configured drive has

 

 

 

 

failed.

 

 

 

 

Off = No drives have failed.

 

 

 

 

 

 

 

16

Active redundancy

Green = Controllers are operating with

 

 

 

 

redundancy.

 

 

 

 

Off = No redundancy exists.

 

 

 

 

 

 

 

17

Fault

Amber = Error message has been received

 

 

 

 

by the controller display.

 

 

 

 

Off = No error message has been received

 

 

 

 

or no error message is displayed currently.

 

 

 

 

 

 

Battery-Backed Write Cache Enabler Overview

The Battery-Backed Write Cache Enabler, also known as the battery module, provides transportable data protection, increases overall controller performance, and maintains any cached data for up to 72 hours. The NiMH batteries in the battery module are continuously recharged through a trickle-charging process whenever the system power is on. Under normal operating conditions, the battery module lasts for 3 years before replacement is necessary.