Wednesday, February 13, 2019
ATA to Ultra ATA :: essays research papers
ATA to Ultra ATA/66Advanced ATA Storage port Introduction port wine History Understanding the requisite for a red-hot Disc Interface Technology Overview Performance Increase Cost stabilisation Backward Compatibility System Requirements Data Integrity and Reliability Conclusions More discipline IntroductionThe PC industry is constantly searching for advanced technology. This equates to to a greater extent disc space, faster deed, more memory, better displays virtually every fixings is under relentless pressure to improve. Continual improvement for the disc repulse industry means lower costs, improved reliability, higher capacity, and better performance. As PC performance increases, the performance of the serious drive, which is the central input/ product (I/O) device of the PC, becomes increasingly important. Improvement in disc drive performance is a complex area and is measured using several components examine time, rotational latency, internal transfer rate, cache, and porthole speed.Interface HistoryThe hard drive interface is the path through which selective information travels between the PC and the hard drive. The original ISA-dependent ATA (IDE) interface was limited to about 4 Mbytes/ south in the beginning, but reached as high as 8 Mbytes/ second base. Interface protocols, such as programmed input/output (PIO) and direct memory access code (DMA) modes, were designed to take advantage of the new local bus architectures that replaced ISA. ATA interface modes have progressed from PIO to DMA and now Ultra DMA, giving data transfer evaluate from 8.3, 11.1, and 13.3 Mbytes/sec up to 16.6, 33.3, and now 66.6 Mbytes/sec.Specification ATA ATA 2 ATA 3 ATA/ATAPI 4 ATA/ATAPI 5 goop Transfer Modes PIO 1 PIO 4DMA 2 PIO 4DMA 2 PIO 4DMA 2UDMA 2 PIO 4DMA 2UDMA 4 Max Transfer Rate 4Mbytes/sec 16Mbytes/sec 16Mbytes/sec 33Mbytes/sec 66Mbyte/sec Max Connections 2 2 2 2 per blood 2 per cable Cable Required 40-pin 40-pin 40-pin 40-pin 40-pin, 80-conductor Add itional Features - Base - Speed- Synchronous Transfers - S.M.A.R.T.- plug away Mode - Queuing- Overlap- ATAPI - Speed- Data Reliability Year Introduced 1981 1994 1996 1997 1999 The trends in the above chart show that several components have improved with the maturation of the ATA interface. Speed and functionality have made major strides over the years. Performance stay the most commonly considered attribute with interface developments, and Ultra ATA/66 makes irrupt data transfer rates of up to 66.6 Mbytes/sec possible.Understanding the Need for a Faster Disc InterfaceUltra ATA/66 provides a low-cost, high-reliability, backwards-compatible solution to data transfer bottlenecks that slow overall system performance. As the data storage density (areal density) of disc drives and rotational speeds have increased, bottlenecks as well increased, thus requiring the ATA interface to improve performance to attain compatible data transfer speeds.