Toshiba T4500 User Manual page 11

1.3 3.5-inch Floppy Disk Drive
The T4500/T4600 Family 3.5-inch 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 T4500/T4600 Family FDD is shown in Figure 1-6. The specifications for the FDD are de-
scribed 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
Figure 1-6 3.5-inch FDD
Table 1-1 3.5-inch FDD Specifications
Item 2-MB mode
2,000
1,311
2
80
3
181
15
135
500
300
Modified Frequency Modulation (MFM)
1-MB mode
1,000
737
2
80
3
181
15
135
250
300
1-11