![]() Legacy IDE aimed to provide compatibility with older devices while foregoing the advanced functionalities that are available when using AHCI. In order to maximize the compatibility of SATA to hardware that is being manufactured, manufacturers introduced a couple of modes of operation including AHCI and Legacy IDE. ![]() ![]() Hot-plugging simply allows users to remove or connect drives without needing to turn the whole system off pretty much like a flash drive. Hot-plugging is a feature that doesn’t really improve the performance of the system but makes it easier and more convenient for users to add or replace disks. The result of this is somewhat uneven as although the total time is reduced, some of the earlier requests might be sent to the back of the list. Instead of servicing each request sequentially like in traditional systems, it analyzes all the requests and plots out a path that takes the least amount of time to service all requests. NCQ stands for Native Command Queuing, a feature that modifies the sequence in which data is retrieved. The Advanced Host Controller Interface or commonly known as AHCI is a new programming standard that defines a new mode of operation for SATA that adds two extra features NCQ and hot-plugging. It provides a lot of advantages compared to PATA, including faster data speeds. ![]() SATA is a Serial ATA interface that is meant to replace the aging PATA technology. IDE - Integrated Drive Electronics (1 st version of ATA)ĪHCI - Advanced Host Controller Interface ![]()
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