Apple Power Macintosh 7600/200 Series - Manual (Page 163)

Your CD-ROM disc is vibrating in the CD-ROM drive.
m Some CD-ROM disc labels have artwork that is noticeably thicker on one
side than the other and can cause the disc’s weight to be slightly off-center.
This uneven distribution of weight coupled with the high rotation speed of
your CD-ROM drive can cause some discs to wobble in the drive and make
your computer vibrate. The vibration damages neither the CD-ROM disc
nor the computer and affects very few CD-ROM discs. If you can feel or
hear that the CD-ROM disc is vibrating in the computer, you don’t need to
do anything special; continue to use the CD-ROM disc as you normally
would.
Note: If you use a CD-ROM disc with a removable (sticky) label, remove
the label before inserting the disc.
Problems using ISO 9660 or High Sierra discs
You cannot access files on a CD-ROM disc that uses the ISO 9660 or High Sierra format.
m Discs in the ISO 9660 and High Sierra disc formats have version numbers
attached to file names. Some application programs need these version
numbers in order to work with files. To make the version numbers
available to programs on your computer, follow these instructions.
Drag the CD-ROM disc icon to the Trash. When the tray opens, hold down
the Option key and push the tray back in. Continue to hold down the
Option key until the disc is mounted in the drive. The program you are
using should now be able to locate file names on that CD-ROM disc.
m Make sure that Foreign File Access, ISO 9660 File Access, and High Sierra
File Access files are present in the Extensions folder in the System Folder
on your hard disk. If these files are not present, reinstall your CD-ROM
software. The easiest way to do this is by reinstalling your system software,
following the instructions in Chapter 11, “Diagnostic Techniques.”
163 Solutions to Common Problems