Hardware Components
Mass Storage Devices
Chapter 5
106
Optical Drives
IDE CD-ROM Drive
Some models
1
have a 48x IDE CD-ROM drive in a 5.25-inch
front-access shelf ATAPI, supporting ATAPI commands and with audio playback
capability. It can play any standard audio CDs and CD-ROMs, conforming to optical and
mechanical standards as specified in the Red, Yellow, Green, and Orange Book.
Some of the 48X IDE CD-ROM features include:
• Application disk type (confirmed by Red, Yellow, Green, Orange Book)
• CD-ROM data disk (Mode 1 and Mode 2)
• Photo-CD Multisession
• Audio CD
• Mixed-mode CD-ROM (data and audio)
• CD-ROM XA, CD-I, CD-Extra, CD-R, CD-RW
Table 5-7 IBM SCSI Hard Disk Drives
FEATURE
IBM Ultrastar
36LZX
(DDYS-T18350)
IBM Ultrastar
36LZX
(DDYS-T36950)
Capacity 18.35 GB 36.7 GB
Interface Ultra160 SCSI Ultra160 SCSI
Ext. peak transfer rate 160MB/sec 160MB/sec
Average seek time (read) 4.9 msec typical 4.9 msec typical
Internal data rate (MB/sec) 280MB/sec min. to
452 MB/sec max.
280 MB/sec min. to
452 MB/sec max.
Number of discs/heads 3/6 6/12
Buffer size 4096 KB 4096 KB
1. See the HP Workstation x2100 Service Handbook to determine which models are
installed with the 48X IDE CD-ROM drive.
Description
Data capacity 650MB
Data transfer rate Sustained transfer rate (1X=150 KB/sec) Outerside:
7,200KB/sec
Burst transfer rate:
PIO mode 4 - 16.6 MB/sec maximum
Single Word DMA Mode 2 - 8.3 MB/sec maximum
Multi Word DMA Mode 2 - 16.6 MB/sec maximum
Buffer memory size 128KB
Access time Average stroke (1 / 3) 110ms
Full stroke 180ms
Rotational speed 2,048 bytes (Mode 1)
2,336 bytes (Mode 2)
