Fixed-Media Mass Storage Problems - DEC 4000 AXP Service Manual

Table 2–6 Fixed-Media Mass Storage Problems
Problem Symptom
LDC failure Disk power failure LED on PSC
is on.
LDC OK LED on storage
compartment front panel is
off.
Power-up screen reports a failing
storage adapter port.
Drive failure Fault LED for drive is on
(steady).
Duplicate bus Drives with duplicate bus node
node ID plugs ID plugs are missing from the
(or a missing configuration screen display.
plug)
A drive with no bus node ID plug
defaults to zero.
Bus node ID set Valid drives are missing from
to 7 (reserved the configuration screen display.
for host ID)
One drive may appear seven
times on the configuration screen
display.
Storage drawer Disk power failure LED on PSC
not properly is on.
seated
LDC OK LED on storage
compartment front panel is
off.
Power-up screen reports a failing
storage adapter port.
Corrective Action
Replace LDC.
Replace drive.
Correct bus node ID plugs.
Correct bus node ID plugs.
Remove drawer and check its
connectors. Reseat drawer.
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Power-On Diagnostics and System LEDs 2–21