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Silberschatz, Galvin and Gagne ©2005

Operating System Concepts

Storage Structure

Main memory – only large storage media that the CPU can access directly.

Secondary storage – extension of main memory that provides large nonvolatile storage capacity.

Magnetic disks – rigid metal or glass platters covered with magnetic recording material

Disk surface is logically divided into tracks, which are subdivided into sectors.

The disk controller determines the logical interaction between the device and the computer.

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