Flowchart For Troubleshooting Removable-Media Problems - DEC 4000 AXP Service Manual

Figure 2–13 Flowchart for Troubleshooting Removable-Media Problems
Has the drive failed?
Check the drive's fault LED.
LED off
Continue
Are bus node ID plugs improperly set?
Check that all drives on the bus have unique bus node ID numbers (no duplicates).
Check that no drive is set to bus node ID 7 (reserved for host ID).
Continue
Is the SCSI continuity card missing?
Check the console event log for an error message indicating a SCSI continuity card
is missing. If the top and/or bottom storage compartments do not have half-height
drives, a SCSI continuity card is needed to continue the bus. Refer to Section 6.1.5.2
for more information.
Half-height drive or
SCSI continuity card
present
If console event log reports erroneously that the SCSI continuity card is missing,
replace the Vterm module. The Vterm module contains the logic for reporting
SCSI continuity card errors.
Continue
LED on (steady) Drive failure
Duplicate bus node IDs Configuration rule violation
Drive set to host ID 7
Configuration rule violation
SCSI continuity card SCSI continuity card missing
missing
Power-On Diagnostics and System LEDs 2–23
LJ-02549-TI0A