Computer storage device

 COMPUTER STORAGE DEVICES 

Storage devices are used to store information until it is deleted or overwritten by the user. The cpmmonly used storage devices are: 

HARD DISK

It is the most typical storage system for storing a considerable amount of knowledge. It can be referred to as HD or HDD (Hard Disk Drive) or Winchester Disk. It was launched in 1954 by an IBM group led byReyJohnson. Hard disk is made up of a group of disks Known as platter.    connected to a single entry learn/write heads one for both sides. All the learn/wnw "cc— ^^ ^^ number of tracks to arm so that they do not move independently. Eacnpiaw.r"-^^ ^ ^.^^^ ^ has the shop knowledge. A monitor location that cuts throughout all platters i following properties: 

1.Coated with magnetic materials, it's arduous and rigid. 

2. It has a big storage capability. It can retailer as much as eight TB of knowledge. 

3. The disk rotates at a really excessive velocity, various from 5400 to 15000 rpm (Rotations per minute).

CD ROM

A CD-ROM stands for Compact Disc-Read Only Memory. Read solely means you can't change the pre-recorded info saved on the disk. It is a sort of optical disk able to storing a considerable amount of knowledge, info, software program, and many others. Today, a lot of the software program, like audio. video, graphics, and multimedia displays are discovered on CDs. The knowledge from a CD might be accessed utilizing a CD drive. 

The storage capability variesfrom 650 MBto900 MB. 

It is made up of a reflective steel coating (often aluminum) and enclosed between two protecting polycarbon layers. In the highest layer, labels and outline of disks contents are printed. The backside layer reads knowledge. This backside layer contains of tens of millions of tiny depressions and flat surfaces referred to as pits and lands respectively. To learn knowledge from a CD-ROM, a excessive energy laser beam is required. 

The velocity of a CD-ROM drive is known as knowledge switch fee and is measured in Kilo bytes per second (kbps). 

CD'S are available two sizes, the usual CD with 120mm diameter and mini CD with 80mm diameter. 

BLU-RAY DISK 

Blu-ray disk is a brand new optical disk format that's quickly changing a DVD. This format was developed to allow recording, rewriting and playback of excessive definition video (HD), in addition to for storing great amount of knowledge. The identify Blu-ray Disk is derived from the blue-violet laser which Is used to learn and write one of these disk. This disk has the identical dimension as that ofaDVD and CD. It has the next options and benefits: 

1. Largest Capacity: It can maintain upto 25 GB of knowledge on a single layer and 50 GB of knowledge on a twin layer disk. Blu-ray disk can retailer upto 6 instances the information saved in an everyday DVD. 

2. Maximum Picture Resolution: Blu-ray disk delivers full 1080p excessive definition video help that ensures top quality video copy. All the newest 3D films at the moment are distributed solely on Blu-ray. 

3. Uncompressed Surround Sound: Blu-ray disk ensures the best high quality audio copy and leisure. 

4. Backward Compatibility: Blu-ray disk gamers help and will let you watch and revel in your current DVD libraries. 

5. Disk Robustness: Breakthroughs in hard-coating applied sciences allow Blu-ray disks to qgerthe strongest resistance to scratches and fingerprints. 

FLASH DRIVE 

It is a small and transportable flash reminiscence knowledge storage system, primarily used to switch audio, video, and knowledge information from the arduous drive of 1 pc to a different. It is detachable and rewriteable. It is plugged into the pc USB port. It consists of a small PCB (Printed Circuit Board), which comprises the circuit parts and a USB connector that's electrically insulated and guarded inside a plastic, steel, or rubberised case. 

Rash drive can be referred to as Pen drive or Thumb drive and is out there with storage capability of UP to 2TB of knowledge. 

MEMORY STICK

A Memory Stick is a detachable flash reminiscence card. It is used as a storage media for transportable units, like digital digicam, cell phone, and many others. that may simply be linked to a private pc. For instance, digital compact cameras/cellphones use Memory Sticks for Storing picture information. With USB 2.zero primarily based reminiscence card reader, we will switch the images tal<en with the digital digicam/cell phone to a pc.A Memory Stick is flexible, appropriate, and person fnendly which makes it the most well-liked Problem reminiscence system used for storage sharing having fun with digital content material anyplace, any time. It is out there in Four MB, eight MB, 32 MB, 64 MB, 128 MB, and stick comes within the following varieties: 

1. Memory Stick PRO. launched in 2003 as a joint effort of Sony and SanDisk, it's accessible in storage sizes as much as 2 GB. 

2. Memory Stick Duo and Memory Stick PRO Duo are principally smaller variations^of  the Memory stick and M^orv^ck Pre. Memory stick Duo was changed by Memory stick Pro Duo'due to its sluggish switch velocity. With quicker knowledge switch velocity and excessive capadty flash reminiscence, a Memory Stick Pro Duo card completely meets the necessities of a conveyable digital system. 

3. Magic Gate is a duplicate safety know-how launched by Sony in 1999. It is a type of DRM (Digital Rights Management) that permits for protected content material to be transferred to and from a reminiscence card and utilised on a tool, equivalent to an MP3 participant or a cell phone. It encrypts the information saved on a card and enforces management over how information are copied. It is usually used for audio and video however may also be used for contents in different codecs. 

FLOPPY DISK

A floppy disk is a magnetic storage medium for computer systems. The floppy disk or floppy diskette is composed of a thin, flexible magnetic disk sealed in a square plastic carrier. We need a floppy disk drive (FDD) in order to read and write data from a floppy disk. A floppy disk is also simply referred to as a floppy. The first floppy disk that came in the market was 8 inches (200 mm) in diameter. In the late 70s, an 8-inch disk could store about 1 MB of data. Then came a smaller version of the same design, the 5.25-inch (133 mm) floppy which could also store 1 MB of data. Later in the SO's, the 3.5 inch floppy disk became popular. This could store 1.44 MB of data.