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Appendix C
DKUOOO-HLOG
Diagnostic Panel
The DKUOOO-HLOG Diagnostic Panel tests disk drives. When the disk drive is offline,
the panel simulates an interface controller and functions as a drive exerciser. When the
disk drive is online, the panel functions as a status monitor. All errors detected by the
panel are encoded and logged in its internal memory and retained for more than 100
hours after power has been turned off.
C.I CONTROL PANEL
The diagnostic panel is shown in Figure C-I. The panel contains a 25-key keypad, five
LED status indicators, a six-digit liquid crystal display (LCD) window, and two sum-
mary charts. A mounting spring on each end attaches the panel to the disk drive as shown
in Figure C-2.
A 0.4 Farad capacitor provides nonvolatile memory for the logging function. The
diagnostic panel is connected to the disk drive by an interface cable as shown in Figure
C-3.
C-I
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