Sony PCV-W20 - VAIO - 512 MB RAM Online Help Manual page 95

About DVD, CD, and Floppy Disk Media
Handling CD or DVD media

Do not touch the surface of the disc.

Do not drop or bend the disc.
 Do not use adhesive labels to identify the disc. The label may come off while the disc is in use in the optical drive
and damage the drive.
Page 95