HP X Class 500/550MHz, Reference Manual

Page: 86 / 149

86 Chapter 3
Interface Boards and Mass-Storage Drivers
Mass-Storage Drives
HP CD-RW Drive
Some models
1
have a CD-RW (ReWritable) drive supplied in a 5.25-inch front-access shelf
ATAPI, supporting ATAPI commands and with audio playback capability. It can play any
standard CD-Audio disks, in addition to CD-ROM disks, conforming to optical and
mechanical standards as specified in the Red, Yellow, Orange and Green Books. The HP
CD-RW drive can store up to 650 MB of information and, supports CD-RW (ReWritable)
media (120 mm), and CD-R (write-once) media (120 mm and 80mm).
1. Refer to the HP V
ISUALIZE
Personal X-Class Workstation Service Handbook to find out which Personal
Workstations are installed with a CD-RW drive.
Table 3-10. HP CD-RW Drive
Description
Disk Data Capacities Listed capacity: 74 minutes
Data capacity: 530 MB for CD-RW
Data capacity: 618 MB for CD-R
Performance Buffer Size: 768 KB
991 kB or 975 KB (depending on the writing mode used)
Average seek time (1/3 stroke): <150 ms
Data transfer rate (recording):
150 KB/s sustained (1X speed)
300 KB/s sustained (2X speed)
600 KB/s sustained (4X speed on CD-R media)
Data transfer rate (reading):
150 KB/s (1X speed)
300 KB/s (2X speed)
600 KB/s (6X speed)
1200 KB/s (8X speed)
1500 to 3600 KB/s (10X to 24X speed)
Error rate:<1 frame/1012 bits
Audio distortion:<0.1%
Format and ECC Standard Red, Yellow, Orange, Green Books
Buffering 8X = 2,692 MB
Write Methods • Track at once
• Incremental (packet)
• Multi-session access
Orange Book part 2
• Session at once
• Test write
• DAO
Write Verification Automatic Power Control to dynamically adjust laser write
power.
Data read after write verification by Host.
Minimum Burst Transfer Rate 2.5 Mbytes/sec