Overview

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. hdparm is a command line utility for the Linux and Windows operating systems to set and view ATA hard disk hardware parameters. It can set parameters such as drive caches, sleep mode, power management, acoustic management, and DMA settings. Changing hardware parameters from suboptimal conservative defaults to their optimal settings can improve performance greatly. For example, turning on DMA can in some instances double or triple data throughput. Unfortunately at present there's no reliable method for determining the optimal settings for a given controller/drive combination, except careful trial and error; nor is there yet any central database that collects and shares the combined experience of hdparm users.

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