Technical information

Chapter 1 19
Hard Disk Drive Interface
Item Specification
Vendor & Model Name Hitachi
DK23EA-30
Capacity (MB) 30G
Bytes per sector 512
Data heads 2
Recording zone 16
Drive Format
Disks 1
Spindle speed (RPM) 4200 RPM
Performance Specifications
Buffer size 2048KB
Interface ATA-5 (IDE)
Max. media transfer rate (disk-buffer,
Mbytes/s)
19.4 ~ 37.1
Data transfer rate (host~buffer,
Mbytes/s)
16.6 MB/Sec.
(PIO Mode 4/Multiword DMA Mode 2)
100 MB/Sec.
(Ultra DMA Mode 5)
DC Power Requirements
Voltage tolerance 5V(DC) +/- 5%
CD-ROM Interface
Item Specification
Vendor & Model Name Mitsumi SR-244W1
Performance Specification
Transfer rate Read Sustained:
1545~3600 KB/sec
Programmed I/O:
16.7 MB/sec Max. (Mode 0~4)
Multi-word DMA:
16.7 MB/sec Max. (Mode 0~2)
Ultra DMA:
33.3MB/sec Max.
Access time (typ.) Random: 115 ms
Full Stroke: 250 ms
Rotation speed 5136 rpm
Data Buffer Capacity 128 KB
Interface IDE
Applicable disc format CD/CD-ROM(12cm,8cm), CD-R, CD-RW, CD-DA, CD-ROM (Mode 1,
Mode2), CD-ROM XA (Mode 2, Form1 and Form 2), Photo CD (Single, Multi-
session), Enhanced CD
Loading mechanism Drawer with soft eject and emergency eject hole
Power Requirement
Input Voltage +5V[DC]+/-5%