Secondary memory is where programs and data are kept on a long-term basis. Common secondary storage devices are the hard disk and floppy disks.
A hard disk might have a storage capacity of 250 gigabytes. This is about 400 times the amount of storage in main memory. A hard disk is slow compared to main memory. If the processor interacted with it directly the entire computer system would slow down. The reason for having two types of storage is this contrast:
Primary memory | Secondary memory |
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Floppy disks are mostly used for transferring software between computer systems and for casual backup of software. They have low capacity, and are very, very slow compared to other storage devices.
Say that you have purchased the game Doom III © and have installed it on your computer. The game consists of
After installation, where is each of these parts located in your computer system?