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OS : WIndows 7, Windows 8.0, Windows 8.1, Windows 10
IDE, AHCI and RAID are all operating modes in SATA environments. Each has its relative strength and weakness.
IDE and AHCI are peripheral component interconnect (PCI) devices that move data between system memory and SATA controllers. Both add more advanced storage features. AHCI is newer than IDE, and enables more advanced storage features. However, both are older technologies that are not in widespread usage in storage arrays, especially with the growth of SSDs.
RAID is hardware or software that provides redundancy in multiple device environments, and accelerates HDDs. Like AHCI and IDE, RAID supports SATA controllers, and many RAID products enable AHCI upon installation to provide advanced storage features for single-disk applications.