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C.1.2 LED Status Indicators
Three LEDs, labelled TEST, LOG, and STATUS, indicate the operational mode of the
diagnostic panel. Two additional LEDs, labelled RUN and ON CYL, indicate the
operational mode of the disk drive.
C.1.3 LCD Display Window
The six-digit LCD window displays status or error information. Depending upon the
selected operational mode, the following information is displayed:
• cylinder address
• head address
• drive status
• error count.
C.1.4 Diagnostic Panel Summary Charts
Two charts, a Mode/Function Key Matrix and a Test Mode Summary, are included on
the diagnostic panel. The Mode/Function Key Matrix lists the function performed by
each of the six function keys in the three operational modes. The Test Mode Summary
lists the nine seek operations and four parameters used in Test mode.
C.2 STATUS MODE
In Status mode, the diagnostic panel displays the current status of the disk drive. When
an error occurs, data is logged in the diagnostic panel's internal memory and simultane-
ously displayed in the six-digit LCD window. Subsequent errors are logged in memory.
The panel display, however, remains unchanged. Status information is formatted as
shown in Figure C-4.
DRIVE
CYLINDER
HEAD
STATUS
ADDRESS
ADDRESS
m
I~I
j r .1
I
ER~OR
CODE
DRIVE STATE
Figure C-4 Status Mode Display Format
C.2.1 Starting Status Mode
Pressing the SM key starts Status mode. When Status mode is selected, the STATUS and
ON CYL LEDs light. The data window displays the drive status, consisting of the
operational state of the disk drive and an associated error code, the current cylinder
address, and the current head address.
C-6
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