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1.3
3.5-inch External Floppy Disk Drive
The 610CT 3.5-inch external Floppy Disk Drive (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 610CT FDD is shown in figure 1-4.
The specifications for the FDD are listed in table 1-1.
Storage capacity (KB)
Unformatted
Formatted
Number of heads
Number of cylinders
Access time (ms)
Track to track
Average
Head settling time
Recording track density (tpi)
Data transfer rate (Kbps)
Rotation speed (rpm)
Recording method
1-8
Figure 1-4 3.5-inch external FDD
Table 1-1 3.5-inch external FDD specifications
Item
2-MB mode
1-MB mode
2,000
1,440
2
80
3
181
15
135
500
300
Modified Frequency Modulation (MFM)
1,000
720
2
80
3
181
15
135
250
300
610CT
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