32 System Introductions
Hard Disk Drive
Item Specification
Vendor & Model Name IBM DBCA 206480 IBM DBCA 204860
Drive Format
Capacity (MB) 6490 4860
Bytes per sector 512 512
Logical heads 15 15
Logical sectors 63 63
Drive Format
Logical cylinders 13424 10068
Physical read/write head s 4 3
Disks 2 2
Spindle speed (RPM) 4200 4200
Performance Specifications
Buffer size 512KB 512KB
Interface IDE(ATA-4) IDE(ATA-4)
Data transfer rete (disk-buffer,
Mbytes/s) 8.6~14.75 8.6~14.7
Data transfer, rate (host~buffer,
Mbytes/s) 16.6 (PIO mode 4)
33.3 (Ultra DMA mode 2)
DC Power Requirements
Voltage tolerance 5+-5% 5+-5%
Diskette Drive
Item Specification
Vendor & model name TEAC FD-05HG
Floppy Disk Specification s
Media recognition 2DD (720KB) 2HD (1.2MB,
3-mode) 2HD (1.44MB)
Sectors / track 9 15 18
Tracks 80 80 80
Data transfer rate
(Kbit/s) 250 500 500
Rotational speed
(RPM) 300 360 300
Read/write heads 2