Kates Playground Hardcore Streaming

As this component I think we all use and I know it sounds less "Chinese" will try this more technical issue at the outset.

is the primary storage device into a PC. Devices are direct access storage that is accessed directly without passing the information requested by the above, an example of this is a vinyl record (hard drive too), and sequential access, sequential access example would be a cassette tape.
A hard disk consists of a series of plates or disks that are on top of each other, these plates rotate by a motor. The plates are made of magnetic material capable of being magnetized, where information is stored.
To Garbo or read the information found on the plates, the hard disk has a read-out heads that are on an arm that moves into or out of the plates, depending on where you go to read or write (similar to vinyl records, but with great differences not I will not comment on the thing rolling ...)

Divisions
disc Track: is each of the circumference of the plate, where the information is recorded. Each dish on the same disk, has the same number of tracks. Cylinder
: The set of tracks that are vertically one above the other in the various dishes, try to write the information discs consecutively in the same cylinder, as this will not have to move their heads to keep writing it which is important in reducing reading time after that information (this is one of the reasons why it is often important to defragment your hard disk within the operating system).
Sector: is the result of dividing a track into several equal pieces, is referable smaller portion of a disc.

Disk Types The most common days are 2 types today, but we separated into 3 to make it more comfortable talking about them: the most widespread today in the domestic market and SMEs are commonly called IDE (or Parallel ATA), then its variant: Serial ATA (which actually are also the type IDE) and finally the SCSI (new models of these are called SAS = Serial Attached SCSI) IDE


were until recently the most widespread with a high percentage in domestic market and SMEs, especially for its price and acceptable performance for most mainstream users.
To distinguish the different models of IDE drives we have to lay down the transfer rate of Mb per second (MB / s) that can perform another important factor is the speed that can reach and is measured in revolutions per minute ( rpm).
ide disks of 7 or 8 years ago were of a type called PIO Mode 0, and gave a transfer rate between 600-700 KB / s, were then appearing on the PIO 2, 3 and 4, and in recent years have appeared UDMA 33, UDMA 66, UDMA 100, UDMA 133, 33, 66, 100 and 133MB / s on.
The speed of the current disc is 7200 rpm, although the format for laptop (which discs are much smaller physical size is usually usually 5400 rpm). This technology does not evolve further due to the emergence of the new IDE series (or Serial ATA).

(The image above corresponds to a disk connector commonly called Parallel ATA or IDE only)

Serial ATA drives are also IDE type, but in this case with a stack mode instead of parallel series as above.
download the first Serial ATA is 150MB / s, today's 300MB / s (SATA2) and is expected to reach 600MB / s in no time.
The speed is the same (7200 rpm).
Another visible advantage is the size of the data cable used to connect to the motherboard which is considerably narrower than the previous ones and therefore more manageable, has also been modified by the connector that is supplied (it deir, the power cable that goes from the power supply to the hard drive) by connecting an easier and flatter, and finally tend to have internal cache memory of 8MB, and 16MB (although some low-capacity models incorporate only 2Mb) . This is the most widespread type of disc in new equipment today and lowest cost.

SCSI (read Escasi)
are used primarily in high-performance computers or servers, which need a large transfer rate and service a large number of users at the same time, this is the biggest difference the type of previous albums, an IDE running in server mode data alone is capable of serving other computers accessing the one by one, while the SCSI divide their bandwidth and provide data to all users at the same time.
There have been various types of SCSI connectors, currently the connector is trapezoidal in shape called LVD, these discs are called Ultra 320, with Transfer speed 320MB / s and have a speed of 10,000 rpm (although it is easy to get discs in the normal market of 15,000 rpm at a price a little high), those before them were the Ultra 160 (160MB / s) and above, and old, with a different connector called narrow and similar to the IDE disks reached a transfer rate of 80MB / s.
For SCSI disks usually have to purchase a controller card to hand, and that motherboards are usually not integrated connector for plugging in the case of the IDE is not necessary because their use is very common and this driver is already integrated on the motherboard.
SCSI disks are much more expensive than IDE, due to its high performance, they must purchase separate controller and especially their sale is a minority, so that fewer units are produced.
Within the family of these disks is a subset of known SCA SCSI disks have the same technical features that a normal but change the SCSI connector that is used exclusively for mounting in a box (SCA can not be installed if not in SCA a box) and make HOT SWAP (hot swapping), the use of this is to replace a damaged disk without powering down or opening the computer (serial ATA disks also support this type of use). Lastly
new SAS disks having a data connector that is physically as the Serial ATA and SAS controller can be connected perfectly a SATA (on a SATA controller can not connect a disk but SAS), the transfer speed of these discs is 600MB / s and the other features are equal is that the SCSI "normal" except that as the only SATA hard drive can be connected per channel (in the Parallel IDE can connect 2 per channel), the advantage is not so must share the bandwidth among all the disks that are connected to a controller.