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File No.
960-010
1.4
3.5-INCH FLOPPY DISK DRIVE
The 3.5-inch internal FDD is a high performance, reliable
and thin drive that supports 720-Kbyte (formatted) 2DD and
1.44-Mbyte (formatted) 2HD 3.5-inch floppy disks.
The FDD is shown in figure 1-5 and its specifications are
described in table 1-1.
Figure 1-4
3.5-inch FDD
Table 1-1
3.5-inch FDD specifications
Item
Specifications
2-Mbvte mode
1-Mbvte mode
Storage Capacity
(Kbytes)
Unformatted
2,000
1,000
Formatted
1 440
720
No. of Heads
2
2
No. of Cylinders
80
80
Access Time
(ms)
1 Track Access
3
3
Average
94
94
Head Settlinq Time
15
15
Recording Density
17434
8717
(bi t per inch)
(MAX)
Data Transfer Rate
500
250
(Kbytes per second)
Rotational Speed
300
300
(revolutions per minute)
Recording Method
MFM (Modified Frequency
Modulation)
1-7
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