User guide

4-4 Compaq StorageWorks RAID Array 4100 User Guide
Table 4-1
RA4000 Controller LED Descriptions
LED Function Description
0-2 Busy status ON = All LEDs on indicate this array controller is
idle
OFF = All LEDs off indicate this array controller is
operating at full capacity
3-7 Fibre Channel ID Indicates the 5-bit Arbitrated Loop Physical Address
(ALPA) assigned to this array controller
8 Heartbeat Blinks at 1Hz rate, indicating interrupts are enabled
and the array controller is functioning.
9 Active/Standby ON=Controller is active
OFF=Controller is in standby
10 WCXC active ON = Cache transfers are active
11 Logical I/O active ON = Currently processing logical requests from the
Host Adapter
12 SCSI Bus 0 active ON = Indicates requests are outstanding on the first
SCSI bus
13 SCSI Bus 1 active ON = Indicates requests are outstanding on the
second SCSI bus
14 Cache Activity/Error ON = Cache failure
OFF = No cache activity
Blinking = Cache transfer pending
15 Drive failure ON = A configured hard drive has filed in the array
Transmit
LED
Transmit mode ON = Indicates the array controller is transmitting
data over the FC-AL
Receive
LED
Receive mode ON = Indicates the array controller is receiving data
over the FC-AL