How Magnets Affect Computer Disks BackGround One of the most commonly used Computer data storaged mediums is a Computer Disk or a Floppy. These are used in everyday life‚ in either our workplace or at home. These disks have many purposes‚ such as: Storing data: Floppies can be used to store software/data for short preiods of time‚ Transferring data: Floppies are used to transfer/copy data from one computer to another. Hiding data: Floppies are also sometimes used to hide sensitive or confidential
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The hard disk is the main storage device in your computer. It is a bit like a filing cabinet: all of your data files and applications software are stored on it. The hard disk contains a number of metal platters which have been coated with a special magnetic material. The data is stored in this magnetic material. Thus‚ the hard disk is known as a magnetic storage device. In order to access the data‚ the platters spin many thousands of times a second and a magnetic read and write head floats just
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Seven steps to troubleshooting hard drives Here’s a quick and proven hard disk troubleshooting process. With each point‚ ask yourself the question(s) that follow. Physical connectivity – Is the drive receiving power? Is it plugged into the PC by a correctly connected ribbon cable? For IDE drives‚ are its jumpers set correctly? Or with SCSI drives‚ are its SCSI termination and ID set correctly? BIOS setup – Does the BIOS see the drive? Viruses – Does the drive contain any boot sector viruses
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Troubleshooting Tips for New Monitors Here are some basic trouble shooting tips for new monitors: 1. The picture does not appear * Check to make sure the signal cable is firmly connected in the socket. * Check to see if the computer system’s power is ON. * Check that the Brightness Control is at the appropriate position‚ not at the minimum. 2. The Screen is not synchronized * Check to make sure the signal cable is firmly connected in the socket. * Check
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magnetic tape to update a database stored on a magnetic disk c) converting source documents to magnetic tape using a computer-based optical character reader (OCR) d) processing OCR documents online to update a database on magnetic disk e) reading data from a magnetic disk into the computer to be printed on a report f) using a computer or terminal to key data from source documents to a file stored on a magnetic disk g) manually sorting and filing invoices numerically
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HARD DISK DRIVES •Performance •Storage capacity •Software support •Reliability Why we call it as……. • Hard disk • Fixed disk • Winchester disk Hard Disk Drive Components • • • • • • • • Disk platter Read/Write head Head arm/Head slider Head actuator mechanism Spindle motor Logic board Air filter Cables & Connectors • Disk platter • The data’s are stored in this media • Form factor 9 5.5” - actual size is 5.12” 9 3.5” - actual size is 3.74” 9 9 9 9 2.5” 1 1/8” 1 1/3” 1” • The 5.25” platter
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Accuracy of data input is important. What method of data input would be best for each of the following situations and why: * Printed Questionnaires: * Keyboard and mouse * User can type data using the keyboard and use the mouse to click/select pieces of data * Telephone Survey: * Voice input device * Surveys may be set up to function using voice recognition for users responding
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RAM RAM is an acronym for Random Access Memory that is also known as volatile memory‚ because the data it holds is lost when the desktop PC or laptop/notebook computer using it is switched off. Briefly‚ RAM memory is used by the system to store data in the form of files for processing by a computer’s central processing unit (CPU)‚ also known as the processor. The amount of RAM memory used in modern desktop and laptop computers is expressed in megabytes (MB) and gigabytes(GB). A gigabyte (1GB)
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(McConnell‚ Brue‚ & Flynn‚ p. 52). Gone are the days of floppy disks and rewritable cds because USB flash drives have taken over. “A USB flash drive is a data storage device that consists of flash memory with an integrated Universal Serial Bus (USB) interface. USB flash drives are typically removable and rewritable‚ and physically much smaller than a floppy disk. Most weigh less than 1 oz. USB flash drives are often used for the same purposes as floppy disks or CD-ROMS. They are smaller‚ faster‚ have thousands
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file for destination‚ but multiple files for source (using wildcards or file1+file2+file3 format). /Y and /-Y are only available in DOS 6 and above. COPY originated as an internal command in 86-DOS FORMAT External - DOS 1.0 and above Formats a disk for use with DOS. FORMAT drive:
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