Troubleshooting Scsi Problems - HP 3000 Series Handbook

For HP Internal Use Only
Table 5-42. Multifunction 1/0 Card Status LEOs
LED Nik~e
LED Display Description
Mux Status
Blinking Testing
ON Test Failed
OFF Normal
SCSI Selftest ON Failed Selftest
OFF Normal
Termination Power ON Normal
OFF No power (check fuse)
Console/LAN Selftest ON Failed Selftest
OFF Normal
Flashing
LAN network error external to card
ON
Failed
Table 5-43. AOP Panel Status LEOs
LED Name LED Display
Description
Link Status ON Momentarily at Power-Up
ADP to Link not working
ON Steadily
Mux to ADP not receiving data from Mux
OFF
Normal
Power ON
Power to ADP good
OFF No power from M ux
Troubleshooting SCSI Problems
There have been several cases reported to us, where the system log files were getting full with
SCSI errors on HP9000 Model Ex5 systems. The log analysis has showed that the SCSI bus
was being reset by system software.
A high level of signal noise in the SCSI bus can cause the SCSI controller chip to hang. When
this occurs, the SCSI driver
1.
times out,
2. sends a reset to the chip,
3. logs the event, and
4. retries the transaction.
This causes the system log files to fill with SCSI error messages.
If this occurs, check the following items. They can cause noise problems in the SCSI bus:
5-44 Troubleshooting