ATA-4
ATA/ATAPI-4

ANSI drew up in 1998,standardof IDE interface. For the first time,it corresponded toUltra DMA mode,Ultra DMA/33 (Ultra ATA/33) adopted formally. Until recently because ATAPIstandardfor the non harddisk equipmentsuch as the CD-ROM drive whichis another standard is integrated, also "ATA/ATAPI-4" is called.Also the fact that it reaches the point which put the ground cable between the cable for communication, can use 80 core cables is from ATA-4. ATA-4 standardformerATA -3has becomehigher rank interchangeable,ATA-3 ATA -3 inside the rangeof standard,the ATA-4corresponding equipment it can exist together the controller and the drive which correspond to standard.Furthermore, presently ATA which undertakes the successionof ATA-4-5 is done release,the correspondenceto of Ultra ATA/66 is done. In addition, furthermore high speed transfer mode (Ultra ATA/100andUltra ATA/133) ATA which is defined-6 andATA-7 also

standard presently is in the midst of deciding.