DIGITAL STORAGE DEVICES

Digital Storage Devices



Digital Storage Devices

Devices Storage apparatus are used in order to shop various items such as programs, facts and figures and instructions. Storage was utilised as early as 1804 by hole punching paper cards in alignment to command machinery. Without storage, the computer programs and documents that live now would not be possible. There are numerous distinct apparatus utilised for storage today such as hard drives, floppy drives and CD-Rom drives.

Hard drives come in all computers and are the main storage device. An mean hard propel generally shops from four to fifty gigabytes, but there are hard drives with much larger capacities available. Ahard propel works by utilising multiple platters which are made of glass, aluminum or ceramic which has been encased with a magnetic material. The facts and figures is noted by devising the magnetic particles in order to form bytes on the disk.

Floppy drives are another type of storage unit in which the information is retained on a separate removable disk. There are two distinct kinds of floppy drives: a 3.5 inch and a 5.25 inch. The number refers to the dimensions of the disk that is utilised in that specific drive. A3.5 inch floppy propel can shop 1.44 megabytes and a 5.25 floppy can store 1.2 megabytes. Imation has evolved a superdisk propel which has a capacity of 120 or 200 megabytes which is rearwards compatible with the 3.5 inch floppy.

The third kind of storage that I am going to converse about is a CD-Rom (Compact computer disk) drive which also values a removable disk in order to shop data. ACD-Rom works by utilising a laser lens in alignment to set alight pits into the exterior of the CD. The exterior of the disk, called land, reflects lightweight back to the lens which is read as1. The pits in the CD soak up the lightweight and reads to be0. ACD can store up to 700 megabytes of data.

In supplement to a CD-Rom, there is furthermore a DVD (digital video disk) Rom which can shop up to seventeen gigabytes of information. ADVD is different from a CD because the computer disk is denser due to the fact that the pits are packed nearer to each other. Also, A DVD utilises two levels of pits and can be twice sided.

Another procedure of storage is the Zip propel which uses a 3.5 inch zip disk and was created by Iomega. The computer disk can contain the matching of seventy floppy computer disks or 250 megabytes. The Jazz drive, which was furthermore made by Iomega, can shop up to two gigabytes. The drive with the largest capability is the Tape drive which can store some terabytes. The only difficulty with this propel is that the information is only read/wrote in one direction which means that it takes an comprehensive time span of time to get data. Due to this inconvenience, this propel is mainly utilised for back up purposes.

Different types of storage devices are best for varied ...