Writing in layers
Since a hard disk typically contains three platters with a total of 6 read/write heads, the concept cylinders
is employed. Read/write heads move synchronously. Therefore, data are written up and down from platter
to platter. Thus, one file can easily be spread over all 6 platter sides. Let us say the writing starts on track
112 on the first platter. That is completed and writing continues on track 112 - only from read/write head
number 2. Then it continues to numbers 3, 4, 5 and 6. Only then does writing move to track 113.
In this case, a cylinder consists of 6 tracks. For example, cylinder number 114 is made up of track number
114 on all 6 platter sides.
Since a hard disk typically contains three platters with a total of 6 read/write heads, the concept cylinders
is employed. Read/write heads move synchronously. Therefore, data are written up and down from platter
to platter. Thus, one file can easily be spread over all 6 platter sides. Let us say the writing starts on track
112 on the first platter. That is completed and writing continues on track 112 - only from read/write head
number 2. Then it continues to numbers 3, 4, 5 and 6. Only then does writing move to track 113.
In this case, a cylinder consists of 6 tracks. For example, cylinder number 114 is made up of track number
114 on all 6 platter sides.
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