Dell Latitude CPi A-Series User Manual page 205

(SCSI) controller in the C/Port APR or C/Dock Expansion Station, and the SCSI devices attached to either.
These tests run only if the computer is docked.
NOTES: Before conducting these subtests on an external SCSI CD-ROM drive, insert into the drive a
CD with audio and data tracks (such as a multimedia CD). The Audio Output Test requires a CD with
audio tracks; all other subtests require a CD with data tracks.
If the external CD-ROM drive is empty, or if it contains a CD that does not have the required data or
audio tracks, the subtest fails.
Why Run a SCSI Devices Test?
If you check your SCSI hard-disk drive to determine the amount of available space, your operating system
will probably report problem areas. Problem areas on hard-disk drives are common, because most hard-disk
drives have a small amount of space that is not usable. The hard-disk drive keeps a record of this space so
that your computer will not attempt to use it. Identification of unusable disk space, unless it is an unusually
large amount (over 5 percent of the possible total), should not be regarded as a cause for testing the hard-
disk drive.
These are the most common symptoms that might prompt you to test a SCSI device:
A SCSI hard-disk drive fails during the boot routine.
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 or write to a SCSI
device.
Data on a SCSI device is corrupted or lost; these problems may be intermittent. Once saved by a
program, files cannot be properly recalled.
Subtests
The seven subtests in the SCSI Devices test group confirm the following drive functions:
Internal Diagnostic Test
Causes the device to run its internal self-test.
Seek Test
Checks the device's ability to search for a specified track on the device and to position its read/write
heads to all tracks.
Read Test
Positions the read/write heads at each block of the device for reading data and verifies that all tracks
on the device can be read correctly.
Write Test
Positions the read/write heads at each block of the device and verifies that all tracks on the device can
be written to correctly.
Audio Output Test