HP dc71xx Manuale Utente

2-32

361834-002

Technical Reference Guide

System Overview

Table 2-10

Optical Drive Specifications

Parameter

48x CD-ROM

48/24/28x CD-RW Drive

Interface Type

IDE

IDE

Media Type (reading)

Mode 1,2, Mixed Mode, CD-DA,

Photo CD, Cdi, CD-XA

Mode 1,2, Mixed Mode, CD-DA,

Photo CD, Cdi, CD-XA

Media Type (writing)

N/a

CD-R, CD-RW

Transfer Rate (Reads)

4.8 Kb/s (max sustained)

CD-ROM, 4.8 Kb/s;

CD-ROM/CD-R, 1.5-6 Kb/s

Transfer Rate (Writes):

N/a

CD-R, 2.4 Kbps (sustained);

CD-RW, 1.5 Kbps (sustained);

Capacity:
Mode 1, 12 cm
Mode 2, 12 cm
8 cm

550 MB
640 MB

180 MB

650 MB @ 12 cm

Center Hole Diameter

15 mm

15 mm

Disc Diameter

8/12 cm

8/12 cm

Disc Thickness

1.2 mm

1.2 mm

Track Pitch

1.6 um

1.6 um

Laser
Beam Divergence
Output Power
Type
Wave Length

+/- 1.5

°

0.14 mW

GaAs

790 +/- 25 nm

53.5 + 1.5°

53.6 0.14 mW

GaAs

790 +/- 25 nm

Average Access Time:
Random
Full Stroke

<100 ms
<150 ms

<120 ms
<200 ms

Audio Output Level

0.7 Vrms

0.7 Vrms

Cache Buffer

128 KB

128 KB