standards of modern disks over time, more and more developed, as well as the increasing demands of the users.Thus, in these days using a number of different storage devices having different capacities: Blue-ray, HD-DVD, DVD and others.Because of this diversity is rather difficult to choose the average user, especially if he is not versed in current standards.
If disc media is not the scope has evolved over time, such devices are simply outlived their usefulness, and this is not surprising.One can hardly imagine that people today bought some CD-discs with the capacity limit of 700 MB when even the cheapest stick volume of less than 4 GB is already extremely low.At the same time, by its dimensions and ease of use drives is clearly much inferior to modern stick.
However, due to continuous development in this area, we now have an extremely high capacity of Blue-ray, that the cost of such disks, in many cases makes their use much more relevant compared to other similar devices.Today, the capacity of these discs is the largest among all the existing formats of optical media, but many are not even aware that such carriers are and whether or not to use them instead of the standard DVD.
DVD
DVD-ROM received a much greater increase in volume compared to the traditional at the time CD format because it has reduced the wavelength of the laser.The beam having the wavelength refers to the red spectral range, and therefore can often find a formulation that technology DVD-ROM drive is used red laser.The maximum possible capacity of a single layer of the drive can reach 4.7 GB.
HD-DVD
To develop this format worked hard leading specialists NEC and Toshiba.If we talk about the advantages of this format drives, it is worth noting that they use standard protective layer, identical to that covered by the standard DVD.Precisely because of this, such devices have almost the same optical system with standard DVD-ROM drive with a little modernization, providing a much greater possibility of using these devices.The maximum possible capacity of up to 15 GB, which is slightly lower than the capacity of Blue-ray, but it also makes these devices an optimal choice in some situations, because the cost of a little less.But in practice, they have no uses.
Blu-ray
Initially this format, as well as its rival HD-DVD, which long ago had gone into oblivion, was created in order to record high-definition video, which has enhanced algorithms for protection against unauthorized copying.Clearly, more capacious versions of such vehicles will be actively used to disseminate a variety of films and other media with a large volume.It is worth noting that the 3D-movies even today occupy about 50 GB or more, and therefore even a maximum capacity of Blue-ray may be insufficient.
Features and capacity
creation of this format is the fruit of labor, which is an association of the largest modern manufacturers to produce various drives, including Hitachi, Sony, Samsung and a number of other manufacturers.It is worth noting that in 2004, companies such as Dell and HP, have also confirmed that the open support of the format for their devices.
wave laser in this case is much shorter than the standard DVD and thus corresponds to the spectral color blue.Actually, it is this fact and has become a fundamental factor why media format was named that way.By reducing this parameter recording track in this technology has become less than twice, providing a significant increase in data density as well as a marked increase of which has a capacity of Blue-ray-carrier.
Special attention should be paid to the fact that such carriers have a data rate of 36 Mb / s.Information capacity of Blue-ray is 27 GB, it is worth noting that the two-layer drive and all will have a capacity of 54 GB.That is why these discs are now in such great demand, because they can record everything, from some documentation to the most voluminous computer games.
BDXL - Blu-ray 2.0
worth noting that recently the union BRDF was released a brand new disc format that became known as BDXL and IH-BH.Information capacity Blue-ray is now 128 GB limit modification, however, such devices also have some problems: it is their cost, as well as backward compatibility.In this regard, they are not to this day as popular as the previous format.
format was first announced in 2010, and had already struck in some capacity Blue-ray-disc achieved.After all, this volume allows you to record any amount of information, regardless of what the user is going to be stored.Of course, as a portable HDD to use such a device is unlikely to succeed, but in the rest of its features are more than impressive.It is worth noting that in this case the capacity Blue-ray-Disc is the same as that of the standard DVD-27 disc, that is impressive.
IH-BD
Special attention should be paid to the format of IH-BD, as it is a hybrid, and therefore much more versatile compared to peers.In other words, a layer in this case includes only a single entry, while the second provides for an infinite number of rewritable times.Eventually get the drive on which the pre-recorded content, and which subsequently will also complement the information.The maximum capacity of Blue-ray in this case is exactly the same as in the previous case.The optimal use of these drives will be different encyclopedias or corporate databases.
Oddly enough, but, despite what provides the most information capacity of Blue-ray hybrid, to this day, they remain far from being as popular as they could be.
Mini hard drive or is it not?
Of course, the information capacity of Blue-ray can be used instead of such drives even removable hard drives, though the cost is extremely high.For many, this capacity will not be enough, but in fact it is enough to record almost any necessary files.Especially given the fact that the drive does not use any moving parts, storage of information on them is an order of magnitude more secure.
