26-10-2016, 10:47 AM
1461241374-MIUNITIV.ppt (Size: 1.05 MB / Downloads: 6)
Magnetic Disk Storage
Data represented as magnetic spots
Magnetized spot = 1
Absence of a magnetized spot = 0
Read
Converts the magnetized data to electrical impulses
Write
Converts electrical impulses to magnetized spots on disk
Logical Layout of a DiskTrack
Concentric circles
Passes under read/write head as disk rotates
1.44 MB diskette has 80 tracks on each surface
Each track stores the same amount of data