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 Uploading .... The devices to store data are devices that read and write information and can be used as a secondary storing of the computer. This devices store a big amount of information that is used by the users. Because of that they are as used as the main computer.
For that reason nowadays there exist a lot of ways of storing data with its own technology:
The informatics systems can store data internally (in the memory) and externally(in the devices for storing data). Internally the instructions or data can be stored for a period of time in the chips of RAM memory. These chips are limited and due to that we use the devices for storing data, using them we can store the information permanently while they are well-conserved.
There are several types of data storage devices.
First we have the magnetic devices such as:
-Magnetic tape: composed by a plastic lace surrounded by ferromagnetic material, on the tape are recorded in forms of characters combinations of points on tracks parallel to the longitudinal axis of the tape. These tapes are sequential media, this is inconvenient because access to a piece of information is necessary to read all the preceding ones, with the consequent loss of time.
-Hard Disk: This is currently the main storage subsystem in the computer systems. It is a device responsible for persistently storing information on a computerand it is considered the most important storage system of the computer and it saves the program files.
-Diskette or floppy disk: A floppy disk or diskette is a type of data storage device comprising a circular piece of a magnetic material that allows for recording and reading data, thin, flexible (hence its name) enclosed in a thin shell plastic square or rectangular. The discs, are usually used for 3 ½ to 5 ¼ inches, used in computers or personal computers, although currently the 5 ¼-inch disks are obsolete.
Optic devices:
-CD-ROM:is a compact disc of 650 MB capacity that can be read many times as desired, but whose content can not be changed once it has been recorded unless it is a special type of CD.
-DVD-ROM: a CD store with a capacity of 4.7GB of data ar on one side of the disc, an increase of more than 7 times compared to CD-R and CD-RW. And this is on one side. Future DVD-ROM media are capable of storing data on both sides of the disc, and using double layer media to allow the units to read up to four levels of data stored on both sides of the resulting disk storage capacity 17 GB.
-Blu-Ray:is a next-generation optical disc 12 cm in diameter (like the CD and DVD) for high-definition video and high data storage density.
Removable Devices
-Pen Drive or Memory Flash: It's a small storage device that uses flash memory to store information without a battery. The pen drive is resistant to scratches and dust that have afflicted previous forms of portable storage, such as CDs and floppy disks. The most modern operating systems can read and write about it without special drivers. In older equipment (such as those equipped with Windows 98) you need to install a device driver.
Also see:
USB Storing Memories
CD history
Video and audio recording
Blue Ray
Hard Disk
References:
1. http://www.mediastoragedevices.com/
2. http://www.faqs.org/patents/app/20090187688
3. http://www.linux-usb.org/
4. http://www.intel.com/technology/usb/
Created on 17/12/2009
Copyright©2009 Team69A
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