T2150 Series
1.3 3.5-inch Floppy Disk Drive
The T2150 series 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 T2150 series FDD is shown in figure 1-3. The specifications for the FDD are described
in table 1-1.
Figure 1-3 3.5-inch FDD
Table 1-1 3.5-inch FDD specifications
Item 2-MB mode 1-MB mode
Storage capacity (KB)
Unformatted 2,000 1,000
Formatted 1,311 737
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)
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