From the beginning of the personal computer (PC) people need external storage media. Below we discuss the beginning of the external memory (disks) to existing technologies. At the beginning of the PC, there were only floppy disk drives, the 5 1 / 4 “were wide. The operating system and applications needed to be loaded into the disk, only the computer to run in the early 1980s. The hard disk of the computer allows the applications be loaded into the computer without a floppy drive. During this time, people could store their information on those disks and keep it off-line are loaded into the computer later.
The original 5 4.1 “floppy disks instead of 160KB (kilobytes) of data, but improved rapidly to 360KB. To put into perspective this is 1KB about half a page of text. Floppy drives have been pursuing from a vinyl record in what is where the data was stored. 5 1 / 4 “disc is 1.2 MB (megabytes) limits, but still contained in the disk fragile was the subject of environmental contamination. The format of the next was going to be 3 1 / 2 “floppy disks. These were not only smaller, but they had a plastic casing to protect it. Although she started only 720 KB are organizing to data, they were soon in should be capable to 1.44MB of data, and were much easier to save in the cases and off-site. In the late 1980s, the 5 1 / 4 “floppy disks replaced by 3 1 / 2 were” format.
During the same period in the 1980s, is the internal hard drive to a standard PC. There are clear differences between the hard-disk space (think library of information) and memory (RAM – Random Access Memory) and the floppy drive (used to carry information). Hard disks have a 5 1 / 4 size 5 MB “Memory (MB) of data began in constant growth in the 1980s to the disc Quantum 1.28GB. To put it in the right light is about 1 GB 250 MP3 songs. Unlike floppy disks, hard disks were installed in the computer. Hard disks continue to shrink form factor up to 3 1 / 2 growth “in the 1990s. These drives are called half-height drives. In the 1990 drives were quickly growing from around 40 GB (gigabytes) of total memory all the way up to 3TB today (terabyte) drives.
Hard drives continue to shrink with the standardization of notebook models 2 1 / 2 form factor. “Disk drives in an external housing, while about a technical for some time in the consumer market in standard formats such as USB (Universal Serial Bus) was, FireWire and SATA (Serial AT Attachment), although the year 2000 allows. These new formats these must be quite portable speakers with a standard interface (like USB) to connect to another system without pain. USB socket allows more generic and the game is to allow the system to disk, once identified, how to . connect There are some fields on the market that can accommodate multiple hard adrives and be able to RAID (redundant array of independent disks) capabilities. RAID offers the option to either mirror your data from one disk to another or elongation (strip ), the data on the disk you have. What this offer is a failsafe in the event of loss of a hard disk, because the failure of the computer will not notice any difference in access to take your data on the hard disk of other players.
Although hard drives remained standardized form factor (full height or half height), the floppy drive into a field full of diverse products, including USB drives today. At the end of 1980, it was a new format called CD (compact disc), the data are stored on a plastic disc with the support of reflection. These CD drives were 5 4.1 form factor, “and can be easily integrated into existing expansion slot in your PC. CD store 680MB of data began with about 74 minutes of music, reaching at 700 MB of data. CD has become the standard format for removable media and are still widely used today. In the spring of 1990, Iomega has come on the market with the Iomega Zip drive. This external storage device began to 100MB and 750MB densities grew up in. was still ahead on the cartridge 3 1 / 2 “innovation. This new type of storage have different connections to the computer.
Initially the connection SCSI (Small Computer System Interface) was developed later, but to a USB (Universal Serial Bus) port. In 1995 SmartMedia came on the stage of Toshiba Corporation. SmartMedia is a small (45mm) plastic card with a built-in flash memory of 2 MB direct-attached storage, but it quickly grew to 64 MB / 128 MB. These cards are used in digital cameras and other devices the ability to store and playback on your PC to remove. Today you can find different sizes of up to 32 GB on a single card. Unlike older technologies such as new equipment was much more robust than the floppy drive and much more portable. In the same period, the DVD (digital video disc) on the market came to replace the CD. This format provides 4.7 GB Double Layer (8.5 g) of space on the optical disc format as a CD were based. Offer because the increased density of Blu-Ray is here to 50GB of storage space with double-layer discs are the most common. Blu-Ray offers the best high-density video format available on the market today with 100 GB of data, the norm.
Flash to today, have increased as portable hard drives and external storage media in SSD (Solid State Disk) technology. This portable storage solution transformed to carry the ubiquitous USB flash drives with the people. Internal hard drives SSD technology, you can use to connect to the internal SATA drive on your PC or laptop. SATA is the common standard for connecting hard drives. These disks are more durable and have a lower access time. As new technologies such as the emerging cloud computing come, there is less demand for portable storage and hard drives. Cloud computing allows you to run your application on the web while your data elsewhere (the cloud) is stored. Make no mistake about your information stored, but not on your hard disk or floppy disk.
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