1-8
100CS
1.3 3.5-inch Floppy Disk Drive
The 3.5-inch FDD is a thin, high-performance reliable drive that supports 720-KB (formatted)
2DD and 1.44-MB (formatted) 2HD 3.5-inch floppy disks.
The FDD is shown in figure 1-4.
Figure 1-4 3.5-inch FDD
The specifications for the FDD are listed in table 1-1.
Table 1-1 3.5-inch FDD specifications
Item
2-MB mode
1-MB mode
Storage capacity (KB)
Unformatted
2,000 *1
1,000 *2
Formatted
1,311
655
Number of heads
2
2
Number of cylinders
80
80
Access time (ms)
Track to track
3
3
Average
181
181
Head settling time
15
15
Recording track density (tpi)
135
135
Data transfer rate (Kbps)
500
250
Rotation speed (rpm)
300
300
Recording method
Modified Frequency Modulation (MFM)
*1:32 sector/track (256bytes per sector)
*2:16 sector/track (256bytes per sector)
