Chapter 1
23
Hard Disc Drive Interface
Item
Specification
Functionality
Model Name
Toshiba
MK3025GAS
Hitachi
HTS424030M9AT00
Seagate
2.75”W. 37”H ST94019A
Capacity (MB)
30000
30000
40000
Bytes per sector
512
512
512
Data heads
2
2
3
Data Disks
1
1
2
Spindle speed (RPM)
4200 RPM
4200 RPM
4200 RPM
Performance Specifications
Buffer size
2MB
2MB
2048KB
Interface
ATA-5
ATA-6
ATA-5
Media transfer rate (disk-
buffer, Mbytes/s, max)
154.3
~
298.0
M
bits/sec
370Mbits/sec
386Mbits/sec
Interface transfer rate
(host~buffer, Mbytes/
s,max)
100Mbytes/sec.
Ultra DMA mode-5
100 MB/Sec.
Ultra DMA mode-5
100 MB/Sec.
Ultra DMA mode-5
DC Power Requirements
Voltage tolerance
5V(DC) +/-5%
5V(DC) +/- 5%
5V(DC) +/- 5%
Combo Drive Interface
Item
Specification
Vendor & model name
QSI SBW-242C
HLDS GCC-4243N
Diameter
12cm and 8cm
Capacity
CD-ROM
DVD-ROM
650<MB
Model1, 12cm disk
4.7GB
Model1, 12cm disk
Transfer rate (KB/sec)
CD-ROM DVD-ROM
3.6 MB/s max (read)
11.08 MB/s max(read)
Write Speed : 3.6 MB/s (typical)
Access Time
CD-ROM
DVD-ROM
150 ms(typical)
150 ms(typical)
Voltage
DC+5V +/-5%
Applicable disc format
DVD: DVD-ROM (DVD-5, DVD-9, DVD-10, DVD-18),DVD-R, DVD-RW,
DVD+R,DVD+RW,DVD-RAM(optional),CD-DA, CD-ROM/XA, CD-i, Karaoke
CD, Video CD, Multi-session Photo CD, Enhanced CD, i-trax CD, CD extra,
CD Plus, CD-Text, CD-R and CD-RW Discs
Speed
8X DVD Disc Reading Speed
24X CD-R Disc Writing Speed
24X CD-RW Disc Writing Speed
24X CD-ROM Reading Speed
Interface
IDE/ATAPI interface (comliant to ATA /ATAPI-5)
Dimnsion
128.0x12.7x129.0
Weight
Aluminum : 190 gm
Metal : 235 gm