BCA 1001 Secondary Memory By Himanshu Shukla Secondary Storage Secondary storage sometimes called auxiliary storage is non volatile and is used to store data and programs for later retrieval ID: 1003822
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1. Computer Fundamental & Problem solving Techniques BCA 1001 Secondary Memory By Himanshu Shukla
2. Secondary Storage Secondary storage, sometimes called auxiliary storage, is non – volatile and is used to store data and programs for later retrieval. There are many kinds of secondary storage, each with advantage and disadvantages. Most storage devices use either magnetic or optical storage media. Magnetic storage devices use the principle that magnetically charged material has both a North and South pole. These two poles are used to represent 0`s and 1`s and hence binary numbers. When data are read from magnetic media, the read/write head is used to convert the different magnetic poles into binary numbers that the CPU can process. Conversely, when writing data to magnetic media, the read/write head converts the binary signals from the CPU into magnetic charges. Care needs to be taken that magnetic radiation doesn’t spoil ant stored data.
3. Secondary Storage List the benefits of secondary storage. Identity storage media available for PCs. Describe how data is stored on a disk. Understand how data is organized, accessed and processed.
4. Benefits of Secondary Storage By separating storage from the computer, a number of benefits can be derived. Space ReliabilityConvenienceEconomy
5. Space : A diskette can hold the equivalent of 500 printed pages.Reliability: Data in secondary storage is basically safe.Sometimes, however, disks do fail.Convenience: Locating and accessing data is much easier and faster than non – electronic means of storing information.Economy: Together, space – saving, reliability, and convenience lead to cost saving for business. These savings are then passed on to customers