7-16
Compaq Professional Workstation AP550 Maintenance and Service Guide
DVD-ROM Drive
Table 7-13
DVD-ROM Drive
Disk
Applicable Disc Formats
DVD (Single and Double Layer)
CD-ROM Mode 1 & 2 CD-DA CD-XA (Mode 2, Form 1 and 2)
CD-I (Mode 2, Form 1 and 2
CD-I Ready, CD-Bridge, CD-R
PhotoCD (Single and Multi Session)
Disc Diameter
12 cm, 8 cm
Capacity
4.70 Gbytes
8.54 Gbytes
9.40 Gbytes
550 Mbytes (Mode 1, 12 cm)
640 Mbytes (Mode 2, 12 cm)
180 Mbytes (8 cm)
Disc Thickness
1.2 mm (CD-ROM)
1.2 mm (DVD)
Track Pitch
1.6 um (CD-ROM)
0.74 um (DVD)
Block Size
Mode 0 2352 (bytes)
Mode 1
2352, 2340, 2336, 2048 (bytes)
Mode 2
2352, 2340, 2336, 2048 (bytes)
DVD - 2048 (bytes)
Performance
Access Time
DVD - < 180 ms, random (typical)
< 300 ms, full stroke (typical)
CD - < 120 ms, random (typical)
< 200 ms, full stroke (typical)
Data Transfer Rate
(1KB = 1024 Bytes)
150 KB/s (sustained, 1X CD-ROM mode)
1200 - 4800 KB/s (32X CAV CD-ROM mode)
2705 - 8115 KB/s (6X CAV DVD mode
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