Auto
Leave this ON unless you are having trouble reading a defective or damaged
CD-ROM disc.
Normally, the data transfer rate for the drive is 600KB/sec from the data
section of the disc and 150KB/sec from the audio section. However, your
drive is designed to sense if it is reading a defective, damaged or poorly
manufacutred disc and adjust the data transfer rate accordingly.
With the AUTO switch ON, the drive first will attempt to read a disc at quad
speed (600KB/sec). If it is unsuccessful, the drive automatically will switch
to double speed (300KB/sec) and once again attempt to read the disc. If
successful, the drive will continue at double speed until it receives the next
read command. At this point, it will attempt to resume quad speed opera-
tion.
If your drive is unsuccessful in reading a disc at quad or double speed, it will
slow to single speed (150KB/sec) and try a final time to read the disc. If
successful, the drive will continue at single speed until it receives the next
read command. At this point, it will attempt to resume quad speed operation.
If it is unsuccessful in its attempt to read a disc at single speed, you will
receive an error message.
You may override this feature and set your drive to operate only at single
speed (150KB/sec) by setting the AUTO switch/jumper OFF. At this setting,
the drive will transfer both data and audio at 150KB/sec.
We recommend that you set this switch/jumper OFF only under extreme
circumstances (e.g., you have a badly damaged disc that you MUST get data
from).
Test
Leave this OFF. It is for factory use only.
Block
Leave this OFF unless you are working in an UNIX environment and want
to boot from your CD-ROM drive. If so, set this switch/jumper ON.
Eject
In most situations, you will want to leave this switch/jumper OFF.
However, if you are in an environment where you want to prevent others
from borrowing or stealing the disc inserted in your drive (e.g., the drive is
located in a public place where multiple people hae unlimited access), you
can activate the Eject Lock feature. To do so, set this switch/jumper ON.
When this switch/jumper is ON, it is impossible to eject a disc inserted in
the drive by pressing the Eject button. A software eject command must be
issued for the disc to eject from the drive. Check your device driver manual
for instructions on how to issue a software eject command.
CHAPTER 6 ---- Drive Switch/Jumper/Dial Settings
PX-43CH/PX-45CH OPERATION MANUAL
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