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Table 3-A Continued
Summary of Fault Symptoms and Potential Solutions
SYMPTOMS
With the power on, the liquid
crystal display on a Primary
Processor SRU displays the
message: "Disk Load Failed".
(Some versions of SCSI-type
Primary Processor SRUs do
not have displays; in this
case, check for log and alarm
messages.)
The system displays
messages indicating that
disk data is corrupted.
Troubleshooting and Fault Clearing Procedures 21
PROBABLE CAUSES
There is a cabling fault
between the Primary
Processor SRU and the
Mass Storage SRU.
The Mass Storage SRU is
defective.
There is a cabling fault
between the Primary
Processor SRU and the Mass
Storage SRU.
The Mass Storage SRU's
cable is not connected.
There is a power fault.
An SRU is improperly seated.
The Mass Storage SRU is
defective.
CORRECTIVE ACTIONS
Power the system down.
Check that the cable is free of
shorts, open or broken wires, and
bent pins. Ensure that it is securely
connected. Reboot the system by
powering it up again. In units with a
built-in cartridge tape drive, this fault
can also be indicated by the fact that
the tape drive does not chatter as it
attempts to load from tape.
Power the system down and
replace the Mass Storage SRU.
Power the system down.
Check that the cable is free of
shorts, open or broken wires, and
bent pins. Ensure that it is securely
connected. Reboot the system
by powering it up again.
Power the system down and
connect the cable.
Clear the power fault and reboot the
system by powering it up again.
Power the system down, reseat the
SRU, and power the system up.
Power the system down and
replace the Mass Storage SRU.
Reformat the disk. For detailed
instructions on reformatting, refer to
450-1011-302.
Practice 450-1011-501
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