a storage unit reserve (Secondary Storage Device)
.Data storage backup (Secondary Storage Device) working with the computer. To keep a record of data or command group for various uses in the future will cannot be stored in main memory. Since there is no sufficient spaceIf you want to keep the information more and more to use later. It is necessary to the device data, larger, such as data storage backup, or called secondary storage
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current media produced for the backup data of various kinds. Which is divided according to the form of data storage media is 4 type
1.A magnetic storage media (Magnetic Disk device) is a data storage device type disk (disk use aspect. ) which has many types 1
.1 floppy disks (Floppy disks) recorded data media, popular and widespread use. Can buy used shop equipment, general, popular call another name that this diskette luggage ตต์ () or disc.Soft plastic material which is coated with a magnet inside. And wrapped rigid plastic frame layer to another. The disc in the past have very big disk size to 5.25 inches at present is not popular and stop using it. Can see only the size 3.5 inches instead, which is small and portable. Functional structure of the disc to the data format. (format) when used for the first time before every time.(the user need not formatting before use again). The format is a process the file storage space before use, or in other words, เป็นการเต preparation for record-keeping.
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