There are many different types of data storage disks, varying by their capacity, physical properties and how they are read. In this article, three specific types of disks will be explored; these are the CD, DVD, and BD Disks. To clear up any misconceptions, CD stands for compact disk, DVD means digital video disk or digital versatile disk, and BD stands for blu-ray disk. These disks are all 12 centimetres in diameter with a 15mm diameter circular hole in the centre used for positioning the disk in the reader which is called a disk drive.
General Function:
These disks in general work by rotating around its centre point, driven by an optical motor, where a laser beam is precisely focused up on a point on the reflective side of a disk which is reflected back in one of two ways due to microscopic bumps or pits (depending on how you look at it) on the disks inner surface. These bumps are positioned in a line spiralling outwards from the centre ring to the outer part of the disk. Therefore as the disk spins and the microscopic bumps are being read, the laser head slowly moves from the centre to the outer edge or from the outer edge in until the data has been read. Each rotation of the disk, when following the spiral, is called a track. A regular CD has about 22188 tracks (Kioskea.net (2014)) and has a data capacity of 650 megabytes. A regular DVD has a little over 7 times the capacity of a CD which is 4.7 gigabytes and a Blu-ray Disk has roughly 5 times that of a DVD which is 25 gigabytes. The reason why the Blu-ray Disks can hold substantially more data than the others is due to its more advanced optical system.
The Optical System:
The standard CD drive contains a laser (Light Amplification by Stimulated Emission of Radiation...
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...rect disk to purchase for your needs, it is important to know how much space you will need and if you have the correct hardware to use it. Generally you could fit a few dozen music pieces on a CD whereas on a DVD you could fit a whole movie; and on a Blu-ray disk you could fit a complete full HD movie on it plus a little extra. And even then, you may think why not just get a Blu-ray disk and you’ll never run out of space. Well, for starters they cost more and the most common disk drives do not support Blu-ray either, which will cost you much more to buy. Therefore, I generally recommend using DVD’s as they are cheaper, usually have enough storage capacity, and it is very likely that if you already have a disk drive, it would likely support the use of DVD’s and would not require you to buy the needed hardware.
Refer to Table 7 for buyer comparison between disk types.
12. DVDs are digital versatile disc, optical discs used to externally store data. DVDs have higher recording and retrieving speeds, are better suited for backing up information, and have higher capacity per device than
Briton Kane Kramer invented the digital audio player in 1979, known as the MP3 player. Finally, the compact discs (CD) came out in 1982 and “The first album ever released on a CD was Billy Joel’s 52nd Street. The first to sell one million copies was Dire Straits’ Brothers In Arms.” Following the CD were: DAB radio, Sony Discman, Sony Minidisc.... ...
Going to the movies is a favorite past-time event of American lives. A long time ago, however, there wasn’t any rating system. Making one seemed like a good idea at the time. Today, the system is still the same way and doesn’t fit today’s changed time. Therefore, the movie rating system should be revised because the current rating system is outdated.
First, let me give you some history on both of these new forms of DVD's. Blue-ray which was invented by a group of companies called Blue-ray Disc Association. It consists of companies like Sony, Apple, Dell, HP, and many more. Blue-ray will hold 25 gigabytes and will be the same size and shape of a DVD. The only difference is that it uses a different laser which is the color blue. Now you know why they called it this. The big factor that will push Blue-ray to be in your home is that Paramount Pictures, Universal Studios, and Warner Bros will be big supporters of Blue-ray. Another big feature is that it will feature DRM which is digital rights management. Blue-ray has another form of encryption called BD+ that will allow the companies to change the encryption. This will make it very hard to make copies of their products like movies and software.
stored on a computer or other data storage media.MP3 shrinks audio files in such a way that
Since 1999 the growth of spending on DVD purchases and rentals has been incredible. According to Alexander & Associates, “Rapidly growing consumer activity and spending has built this industry into a major market phenomenon. The DVD format for enjoying pre-recorded entertainment at home is extraordinarily popular and consumers are changing their behavior to accommodate it.”
Another feature that is a first in the console industry is Xbox’s internal 8-Gigabyte (Gb) Hard-Drive or Hard Disk Drive (Hdd). This contributes too much of Xbox’s weight, but gives many features. With this you don’t have a need for a memory card to save your game files, you save them right to the hard-drive. This is a very nice feature on the Xbox, because it saves you money.
How a record player works is quite simple. A motor is somehow connected to a solid disc so that the disc is rotated at a constant speed. On top of the rotating disc (platter), The record is placed on top, with a slip mat in between. The slip mat can serve two functions. In the past to hold the record in place so that it would not rotate independently of the platter. Now, however, the slip mat serves a much different function. Instead of holding the record in place, the slip mat is now used to reduce the friction between the spinning platter and the record. This way a DJ can scratch (manually move the record, usually at high speeds) the record while the platter continues to spin underneath. Once the record is rotating, a stylus glides along the grooves and picks up the vibrations, these are then converted into audible sound.
Film From Hell " From Hell" is another movie based on the case of Jack The Ripper, by. the New 20th Century Fox Productions. The Ripper haunted Whitechapel, a. district of East London, during the late 1880s. He was said to be the first documented and investigated serial killer at the time. One thing We should ask ourselves when we are watching this two hour masterpiece.
Introduction Reed Hastings (co-founder) founded Netflix in 1997. During this time, Netflix offered DVD rentals by mail. As Netflix went public in 2002, shortly a year later their subscription reached the one million mark (Netflix Management, 2011). Recently, Netflix was recognized as one of the 50 most innovative companies, ranking number eight for “streaming itself into a $9 billion powerhouse (and crushing Blockbuster)” with 20 million subscribers (fastcompany.com, 2011). This success shows how Netflix embraced a business approach where their mission was to take the troublesome experience of everyday consumers and transform them into a business opportunity.
In 1958 the RCA which is a tape cartridge could hold up to sixty minutes of music. You would put the cartridges in the music players. The RCA could hold way more music than the records and wax cylinders. They stopped selling these in 1964 because of low sales.
So if you’re a photographer or someone that is looking for storage, the best option would be to get yourself a hard disk drive, it might be slow, but you’re paying far less than a solid state drive and getting a lot more storage. The more gigabytes the solid state drive, the more it will cost as they are the new technology, and to get the newest technology, you have to pay the big bucks. On August 15, 2015, Samsung developed and released the world’s largest hard drive at 16TB, and it’s a solid state drive… I wonder how much that is going for. All in all, the hard disk drive easily wins on price, capacity and availability, whilst the solid state drives wins on speed (fragmentation), form factor, durability and
Inside of a standard desktop hard drive you will find one to four of the magnetic disks or as some call them platters. These platters are each 3.5 inches in diameter, different sizes are used depending on the device, such as the laptop version which is 2.5 inches, and in mobile devices some platter can be as little as 1 inch. The platters are coated in a magnetically sensitive material and stacked millimeters apart on a spindle. Also inside the drive is a motor that spins the spindle and platters at speeds of: 4,200, 5,400, 7,200, 10,000, and 15,000 RPM (Revolutions per Minute). The speed at which the platters spin is the primary factor in how fast the data can be read. Data is read or written on the disk in a series of bits, either a “0” or “1”. The bits are represented by the orientation of particles in the magneticall...
We put all of the data onto the platters. They are inside of the hard
Movies and video games today, play a significant role in shaping the attitudes, thoughts, and beliefs of society. In terms of being more influential on its particular audience, video games are a much more potent medium of entertainment than movies for a variety of reasons. The influence video games have on their participant are very obvious and overwhelming. Study’s concur the overall impact of video games on their audience is substantial when comparing them to movies. Video games have a substantial influence on its audience because video games are increasing violent behavior of the player, contain more violent content and a deeper complex plot, and video games require a much deeper lever of engagement of the player.