The current x86 architecture suffers from the `80 constrains. In the last several years the key players in the IT world tried to impose several standards that were supposed to improve the peripherals performance. Current CPUs are very fast, the memory speed (one of the major bottlenecks several years ago) was also improved, but not many things were done in order to improve the storage system performance. Although the IDE standard evolved over time, it’s pretty clear that a radical change has to be done. SCSI designers didn't hesitate to change the electrical and the mechanical specifications of their technology, but the impact of these changes was minimal on the market. SCSI is targeted to the business market, where any change is welcomed as long as it provides a better performance. Business customers are not interested to use the old drives in the new computers, but for regular users it is often important to deal with a backwards compatible standard. For this reason manufacturers made a lot of efforts to improve the IDE standard and to maintain the compatibility with the old drives.
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