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[ The PC Guide | Systems and Components Reference Guide | Hard Disk Drives | Hard Disk Interfaces and Configuration | Integrated Drive Electronics / AT Attachment (IDE/ATA) Interface | Official IDE/ATA Standards and Feature Sets ] ATA/ATAPI-5 Not content to rest on their laurels with the adoption of ATA/ATAPI-4, the T13 committee immediately began work on its next generation, ATA/ATAPI-5. This standard was published by ANSI in 2000 as NCITS 340-2000, AT Attachment with Packet Interface - 5. The changes defined in ATA/ATAPI-5 include:
Like ATA-3, not that many changes were made in ATA/ATAPI-5 (compared to ATA/ATAPI-4 and ATA-2, for example). Unlike ATA-3, the main change made here was a high-profile one: another doubling of the throughput of the interface to 66.7 MB/second. Unsurprisingly, the same companies that called ATA/ATAPI-4 drives "Ultra ATA/33" labeled ATA/ATAPI-5 drives running Ultra DMA mode 4 as "Ultra ATA/66". During 1999 and early 2000, new IDE/ATA drives conforming to this standard were the most common on the market.
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