W8Lect (1)

W8Lect (1) - Mass Storage-4 Floppy Disk Hard Disk Floppy...

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Mass Storage-4 Floppy Disk Hard Disk
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Floppy Disk Format / Storage Capacity 8”  – 256Kb to 2MB 5¼”  – 170 kb to 1.2MB 3 1/2 ” – 360KB to 2MB
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The “Floppy” Writing (encoding) area 18 tracks? Clamping Hub Sector 1 signal hole
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3 ½” Floppy Drives (1.44MB) • The 3 1/2-inch drives first appeared in the IBM PS/2. • 80 cylinders consisting of 2 tracks each with 18 sectors per track, resulting in a formatted capacity of 1.44MB. • Some manufacturers label these as 2.0MB, and the difference between this unformatted capacity and the formatted usable result is lost. • The 1,440KB of formatted capacity includes the FAT table which the file system
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Floppy Disk Operation • The heads record by using a tunnel- erase procedure that writes a track to a specified width, and then erases the edges of the track to prevent interference with the neighbors.
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Disk Changing • Pin 34 called Disk Change determines a disk change. • Disk Change is a signal
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W8Lect (1) - Mass Storage-4 Floppy Disk Hard Disk Floppy...

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