HP Tool Storage 354903-001 User Manual

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. 

 

 

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.