User Guide

File No. 960-140
1-9
1.3 3.5-inch External FDD
The 3.5inch external FDD is a thin, high performance reliable drive that supports 720KB
(formatted) 2DD and 1.44MB (formatted) 2HD disks. The FDD can be connected to the
PC card slot
.
The FDD is shown in Figure 1-4. The specifications for the FDD are listed in Table 1-1.
Figure 1-4 3.5-inch FDD
Table 1-1 3.5-inch FDD specifications
Item 2-MB mode 1-MB mode
Storage capacity (KB)
Unformatted
Formatted
2,000
1,440
1,000
720
Number of heads 2 2
Number of cylinders 80 80
Access time (ms)
Track to track
Average
Head settling time
3
181
15
3
181
15
Recording track density (tpi) 135 135
Data transfer rate (Kbps) 500 250
Rotation speed (rpm) 300 300
Recording method Modified Frequency Modulation (MFM)