To get improved performance in this environment, it is logical to increase the strobe rate. A faster strobe means faster data transfer, but as the strobe rate increases, the system becomes increasingly sensitive to electro-magnetic interference EMI, also known as signal interference or noise which can cause data corruption and transfer errors. ATA-4 includes Ultra ATA which, in an effort to avoid EMI, makes the most of existing strobe rates by using both the rising and falling edges of the strobe as signal separators.
Thus twice as much data is transferred at the same strobe rate in the same time period. To eliminate this increase in EMI, a new pin, conductor cable was developed. This cable adds 40 additional grounds lines between each of the original 40 ground and signal lines.
The additional 40 lines help shield the signal from EMI. The choice is often:. For older drives hard Western digital, as a single, bridging must often be put in the other direction by shorting pins master and slaves.
It is better to use the new master for performance reasons but you need to reinstall Windows or use a program such as Symantec's Ghost cloning. Locate the primary IDE connector usually in blue or secondary usually in black on the motherboard. On each controller, a disk can be single master or single , master with a second drive as slave or slave. The primary hard drive where the operating system is installed must be connected to the Master on the primary controller for the old OS.
Connect the IDE cable on the controller and the hard disk by identifying the line of color on one side of the cable. Normally, keyed on the connector prevents inversion but not always. Pin 1 on the controller must be connected to pin 1 on the drive. By habit, the side color of the water is used for pin 1 noted on the card side of the power connector for peripherals, mother.
Start the computer. For the old BIOS, should be an auto detection or even older ones return parameters manually. Currently, the parameters of hard disks are auto-detected directly at startup. In case of problems of detection or if the computer does not start with the new configuration, check the IDE cable connection properly pressed, meaning , especially if the PC does not start with the led in front front of the box corresponding to the hard drive that remains lit.
Also check the bypass of each master device - Slavic, two masters on the same controller block star. Serial ATA is a new type of controller. The internal design of the disc is identical to that of the previous PATA, only the method of data transfer changed in serial mode.
Parallel connections are not the rates very high, this is related to every bit of data synchronization, but also problems of form of signals when the speed increases, it is more perfectly square. Serial ATA type date may , but the first devices are on the market since the second quarter of The cables are the same and the mixture of controller - disks of different versions is possible with losses of flow.
The interface is no longer a slick but a 7 wire cable 1 signal to send and 1 receiving signal coupled to a differential signal and 3 ground. Each controller is dedicated to a single disc, then in the old standard, two devices divides the connector, reducing performance during the simultaneous use of both. The cable length is limited to 1 meter 45 cm to an ATA Conversely, adapters to connect parallel hard drives on a serial controller.
Generally, the chipset accepts the modes RAID 0 and 1. The SATA is not natively recognized by the Windows installation in the majority of cases, mainly for the old controllers. A floppy disk must be created in advance using the motherboard installation CD.
At the beginning of the installation, you must press the F6 key to install additional driver, insert the disk when requested by the program and select your operating system , XP, , Vista. These discs are interfaced in SATA 2 or 3 , but the big difference between the types seen above is linked to storage technology.
Over shelf magnetic, or engine because the SSD keeps the information using Flash memory like the memories of digital cameras. This has benefits for consumption, resistance to shocks, Performance are in the order of two times higher in general but largely clamped by the MB per second transfer rate very theoretical. They are mainly used in the Netbook for autonomy but start to integrate into consumption and transfer speed network servers.
Their current prices does not use them in standard computers and notebook, even if prices fall. Small problems still, these flash memories have a limited number of entries depending on the technology used: 10, to , also this is theoretical and in practice seems too pose problems, but to take into account for some applications, even though as in the SMART standard disk technique, the controller also manages the defective parts.
Floppy drive. The Hardware 2 course: networks, servers and communications. Introduction 2. Base of electronics 3. Microprocessor assembly 4. Improvement of the processor-based systems.
Processor PC - dedicated servers processors 6. Internal bus PC 7. Since it was a standard for removable media drives, storage capacities are not associated with the standard, and neither are data transfer rates. Note : At this point, varying competing standards began to become more common. Manufacturers began implementing features they anticipated would appear in upcoming official standards, in hopes of beating their competitors to the market with the updated products.
The result was separate, manufacturer-specific, competing standards that, despite much overlap and similarities, were not the same. Since all were extended from actual ANSI standards, they were mostly compatible with each other with the exception of the most cutting edge features or specifications.
However, since some differences were very technical and minute, understanding the differences between specifications can be difficult.
0コメント