https://nalar.dev/tags/ncq/ Recent content in NCQ on Nalar Hugo en-us Wed, 16 Sep 2026 00:00:00 +0700 https://nalar.dev/sata-native-command-queuing-reorders-storage-requests/ Wed, 16 Sep 2026 00:00:00 +0700 https://nalar.dev/sata-native-command-queuing-reorders-storage-requests/ <p>A storage request does not always need to finish in the same order that software submitted it. SATA Native Command Queuing, commonly shortened to NCQ, lets a compatible host issue several commands without waiting for each one to complete first. The device can then schedule eligible work in an order suited to its internal operation.</p> <p>The mechanism was especially valuable for hard disk drives, where physical head movement and rotational position can make request order affect service time. Solid-state drives have no moving heads, but multiple outstanding commands can still expose parallel work to the controller and reduce idle gaps.</p>