IBM 71P7279 Guia Del Usuario página 104

The CD-ROM drive is not recognized by the operating
system, or drive performance is erratic.
Some computers, such as IBM PS/ValuePoint models 6472, 6482, 6484, 6492,
and 6494, have a compatible mode and a high performance mode for mass storage
devices. Normally, the CD-ROM drive functions better under high performance
mode.
However, if your drive is not functioning properly in that mode, you might
need to use compatible mode.
Check the configuration-setup information for your computer.
1. Access your configuration utility program.
2. Select Devices.
3. Scroll down to the Mass Storage Devices section.
4. Mass Storage Devices contains the entries Primary IDE Mode and
Secondary IDE mode. These entries are used to set the performance mode
of each IDE port. Set the mode to Compatible for the port on which you
installed your CD-ROM drive.
Other IBM and non-IBM computers might have similar settings. Check to see if
your BIOS or configuration-setup utility provides for compatible and high
performancemodes for IDE performance. For these computers, use the compatible
mode for slower IDE devices, such as this CD-ROM drive. Refer to the
documentation that comes with your computer for additional details on
selecting IDE performance modes. Many older computers will not have a
selection of IDE performance modes. If the CD-ROM drive still does not read
the data CD, the CD-ROM drive might be defective.
The CD cannot be read.
Consider the following actions.
v The CD might be dirty; clean it as described in "Caring for a CD" on
page 1-8.
v The CD might be defective; try another CD.
v The CD is not ISO-9660 or High Sierra Group (HSG) compatible. Check with
your place of purchase.
The CD does not play sound.
Consider the following actions.
v Check that you are using an audio CD and not a data CD.
v Adjust the volume control on the drive. See "Front view of the drive" on
page 1-3 if headphones are connected to the front of the drive.
B-4
48X-20X Internal IDE CD-ROM Drive: User's Guide