9600 Service Manual - gmecorp-usa.com

Image Storage
DEBUGGING USING IP-SCSI LEDS
Additional diagnostic information is available from the LEDs located on the
IP-SCSI Controller(s). Before switching on the power, open the door of the
electronics rack so that the bottom edge of the IP-SCSI is visible and note
the 3 LEDs on each PCB.
Switch on the power and notice that after the system completes its boot
process, the LEDs are as follows, indicating that the system has stabilized
and is ready for normal operation.
Green Yellow Red
OFF ON OFF
NORMAL OPERATION - The green LED will flash each time a command
is received from the AT host. For a 30FPS system, all commands are
received by the Master IP-SCSI Controller (A11). The yellow LED
indicates the controller is ready to accept a command.
Green Yellow Red
Flash ON OFF
INVALID SYSTEM CONFIGURATION OR IP-SCSI HARDWARE
FAILURE INDICATION - If the LEDs do not change from their power-on
(random) state, the IP-SCSI controller is not being initialized. Check
System Configuration (Level 2 Service) and the IP-SCSI PCB.
GENERAL 4/30FPS SCSI DISK SUBSYSTEM FAILURE INDICATION -
If the yellow LED stays OFF for several seconds during boot or system
operation, a 4/30FPS SCSI disk system hardware failure is indicated.
Check the following: IP cable from IP PCB to IP-SCSI, IP PCB or IP-SCSI
controller.
Green Yellow Red
OFF OFF OFF
SCSI PROBLEM INDICATION - If the red LED goes ON during the initial
boot process, a problem with the SCSI bus is indicated. Check the SCSI
hard disk, the SCSI cable which connects the SCSI hard disk to the IP-
SCSI, or the IP-SCSI itself .
Green Yellow Red
OFF ON ON