Talk:Cylinder (disk drive)

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Hard disk drives are called by that name because they are not floppy (as in floppy disk drives). They are organized as a concentric stack of disks or "platters":

Each platter has two surfaces (although in practice the outer surfaces on the top and bottom of the stack are often unused because of physical space considerations), and each has its own read/write head (which reads and writes data magnetically on the surface). The data is stored on concentric circles on the surfaces known as tracks:

Corresponding tracks on all surfaces on a drive, when taken together, make up a cylinder.

Since an individual data block is one sector of a track.

By Akash Wanjari