Toshiba 650CT Maintenance Manual page 9

1.3 3.5-inch Floppy Disk Drive Module
The 3.5-inch external FDD is a thin, high-performance reliable drive that supports 720-KB
(formatted) 2DD and 1.44-MB (formatted) 2HD disks.
The FDD is shown in Figure 1-4. The specifications for the FDD are described 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
650CT
Figure 1-4 3.5-inch FDD
Table 1-1 3.5-inch FDD specifications
Item
Modified Frequency Modulation (MFM)
2-MB mode 1-MB mode
2,000 1,000
1,440
2
80
3
181
15
135
500
300
720
2
80
3
181
15
135
250
300
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