Toshiba portege 610ct 620ct Instruction De Maintenance
1-8
610CT
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.
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.
Figure 1-4 3.5-inch external FDD
The specifications for the FDD are listed in table 1-1.
Table 1-1 3.5-inch external FDD specifications
Item
2-MB mode
1-MB mode
Storage capacity (KB)
Unformatted
2,000
1,000
Formatted
1,440
720
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)