ATA-66
Ultra ATA/66

IDE which the Quantum corporation and the Intelcorporationannounced in 1998,connectstorage unitsuch as personal computerand hard disk(ATA) extended specification of standard. Also "Ultra DMA/66" "Fast ATA-2" and so on is called. Transfer rate being maximum, has reachedthe two timesthe 66.6MB/s and Ultra ATA. The connector has used the same 40pin connectorsuntil recently, but the signal conductor has become with 80 of times. Downward compatibility is guaranteed,canconnectalso the harddiskof Ultra ATA specification and EIDE specification. By the way the formal calling with "Ultra DMA Mode 4",is standardizedformallyATA of ANSI -5 as a portion of standard.