HP 6000 330s Owner's Manual page 138

Models 330S and 660S
4·2 CD·ROM Drive
HP Series 6000
CD-ROM disks are identical to audio compact discs, except
that they are used to store computer data. CD-ROM disks
are 120mm (4.7 inches) in diameter and use one data
surface with a data capacity of 599 megabytes. The single
data surface contains pits and flat spots which are arranged
in a continuous spiral track which is read at constant linear
velocity.
A CD-ROM disk is mounted in a rigid plastic caddy, similar
to a 3.5-inch magnetic flexible disk (see Figure 4-1). Data is
retrieved from a CD-ROM disk through a window beneath
a shutter in the caddy. When you insert a CD-ROM disk
caddy into the disk port, the shutter opens automatically
to expose the disk surface. When you eject a CD-ROM
disk caddy from the disk port, the shutter closes over the
window to protect the disk surface.
Do not open the shutter manUally. Opening the shutter
will expose the surface of the disk to dust, which over time
will reduce the reliability of the read head in the CD-ROM
drive.