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Chapter 1 21
Bytes per sector 512 512 512
Logical heads 16 16 16
Logical sectors 63 63 63
Drive Format
Logical cylinders 16383 16383 16383
Physical read/write
heads
2/Not show/2 2/Not show/2/2 3/
Disks 1/Not show/1 1/Not show/1/1 2
Spindle speed (RPM) 4200RPM 4200RPM 4200RPM
Performance Specifications
Buffer size 2MB 2MB/8MB for Toshiba 2MB
Interface ATA-5 for other vendors /ATA-
6 for HGST and Toshiba
ATA-5 for other vendors /ATA-
6 for HGST
ATA-5 for other vendors /ATA-
6 for HGST
Data transfer rate
(disk-buffer, Mbytes/
s)
350 350 350
Data transfer, rate
(host~buffer, Mbytes/
s)
100 MB/Sec 100 MB/Sec 100MB/Sec
DC Power Requirements
Voltage tolerance 5 +/- 5% 5 +/- 5%
CD-ROM Interface
Items Specification
Vendor & Model Name QSI SCR242
Mitsumi SR244W1
Performance Specification
Brust Data Transfer rate PIO mode 4:
16.7 MB/sec Max. (Mode 0~4)
Multi-word DMA mode 2:
16.7 MB/sec Max. (Mode 0~2)
Ultra DMA mode 2:
33.3MB/sec Max.
Access time (typ.) QSI-
Random: 90 ms
Full Stroke: 180 ms
Mitsumi-
Random: 100 ms
Full Stroke: 240 ms
Rotation speed 5100 rpm for QSI
5400 rpm for Mitsumi 24X CAV mode
Data Buffer Capacity 128 KB (built-in)
Interface Compliant to ATA/ATAPI-6
Hard Disk Drive Interface
Item