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I
Test Descr;pt;ons
Test 2F --
1/0
last
This test causes the I/O MPU to run a self-test of the I/O
circuitry (in SCSI interface drives only).
To execute Test 2F,
perform the following steps:
1.
Enter Test 2F and press EXEC switch.
2.
If an error occurs during the test, the LCD will display
SCSI
CM:2F
ST:28.
3.
If the test runs error-free, the LCD will display
SCSI
CM:2F
ST:lB.
4.
Press EXEC switch to end the test and return to test
selection.
DRIVE STATUS CODES
Whenever the drive is in a power on condition (de power
active), the Control MPU is periodically checking the operation
of the drive and generating appropriate operating status
codes.
These status codes are displayed on the status/control
panel (if present) and can be reported to the system in
response to an interface command.
Refer to Interface Testing
at the end of this section for more information about status
reporting to the controller or host.
If a status/control panel is attached to the drive, the codes
can be visually monitored by removing the drive front panel
insert.
Table 2-6 lists the status codes and a definition of
each code.
If a drive malfunction occurs, observe the error
code and perform Diagnostic Test 04 to calculate the action to
be taken.
Figure 2-3 shows an example of the LCD during normal operation
and when a fault occurs.
During normal operation, the LCD
displays current drive status, current cylinder address, and
(except for IPI interface drives) which drive channel is
selected and/or reserved.
If a fault occurs, the LCD displays
the type of fault(s) that occurred along with the current drive
status.
If more than one fault occurred, use the SPACE switch
to step through the fault log to determine what faults are
present.
Pressing the Fault Clear switch on the status/control panel
clears the LCD fault display and the FAULT indicator, provided
that the fault condition is no longer present.
However, a
Fault Clear signal from the controller clears only the FAULT
indicator.
2-30
TROUBLE ANALYSIS
83325720 E
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Troubleshooting
