AHCI

Advanced Host Controller Interface（AHCI）は、SATA接続ストレージデバイスのパフォーマンスとユーティリティを向上させるために2004年頃に設計された通信モードです。これはHDD用に設計されており、最大32コマンドの深さを持つ単一のストレージ要求キューを導入しました。これは、HDDがより高いスループットとパフォーマンスを達成できることを意味しましたが、実装はSSDコントローラーテクノロジーの将来のボトルネックになるでしょう。たとえば、HDDは最大200の入出力操作/秒（IOPS）を達成できる可能性がありますが、SATAベースのSSDは最大100,000 IOPSに達し、SATAバスによってパフォーマンスが人為的に制限される可能性があります。


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