Dell Latitude CP, Справочное и ремонтное руководство

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4-18 Dell Latitude CP Reference and Troubleshooting Guide
Subtests
The five subtests in the Hard-Disk Drives (Non-SCSI)
test group confirm the following drive functions:
•
Disk Controller Test
Checks the internal microcode of the hard-disk drive
controller
•
Forced Error-Correction-Code Test
Checks the ability of the hard-disk drive to identify
and correct errors
•
Seek Test
Checks the drive’s ability to search for a specified
track on the drive and to position the read/write
heads of the drive to all tracks
•
Read Test
Positions the read/write heads at each cylinder of the
drive and verifies that all tracks on the drive can be
read correctly
•
Write Test
Positions the read/write heads at each cylinder of the
drive and verifies that all tracks on the drive can be
written to correctly
I
DE CD ROM Drives Test Group
The subtests in the IDE CD ROM Drives test group
check the functionality of the integrated drive electronics
(IDE) CD-ROM drive. Before conducting an IDE CD
ROM test, insert into the drive a CD with audio and data
tracks (such as a multimedia CD).
NOTE: The Audio Output Test requires a CD with audio
tracks; all other subtests in this test group require a CD
with data tracks. If the CD-ROM drive contains a CD
that does not have the required data or audio tracks, the
subtest fails.
Why Run an IDE CD ROM Drives Test?
If you encounter a problem while using an application
program on a CD, the problem could result from the disc
or from the drive. When you encounter problems, first try
using a different CD. If the problem recurs, run the IDE
CD ROM Drives test group.
These are the most common symptoms that might prompt
you to test an IDE CD-ROM drive:
•
Seek errors are reported by the operating system or
application programs.
•
An error message appears on the screen stating that
the computer cannot read from an IDE CD-ROM
drive.
Subtests
The five subtests in the IDE CD ROM Drives test group
confirm the following drive functions:
•
Drive Controller Test
Causes the drive to execute its internal self-test.
•
Seek Test
Checks the drive’s ability to search for each block on
the device.
•
Read Test
Positions the read heads at each block of the device
for reading data and verifies that all blocks on the
device can be read correctly.
•
Audio Output Test
Causes the drive to begin playing the first audio
track on an audio CD. (To determine if the test
passed, listen to the audio output of the drive.)
NOTE: The Audio Output Test does not run automat-
ically as part of the IDE CD ROM Drives test group;
you must select this subtest individually.
•
Eject Removable Media
Checks the drive’s ability to eject the CD tray.
S
erial/Infrared Ports Test Group
The subtests in the Serial/Infrared Ports test group check
the computer’s interface with external devices (such as a
serial mouse or a printer). The subtests in this test group
are not intended as a diagnostic test for the external
device itself.