![]() Settings range from values 1 through 127 (which permit A low value means aggressive power managementĪnd a high value means better performance. B Get/set Advanced Power Management feature, if the drive ![]() A Get/set the IDE drive´s read-lookahead feature (usually ONīy default). Many IDE drives also have a separate built-in read-aheadįunction, which augments this filesystem (software) read. Large files, by prefetching additional blocks inĪnticipation of them being needed by the running task. This is used to improve performance in sequential reads of ![]() a Get/set sector count for filesystem (software) read-ahead. Query (get) the device state, and with a parameter (e.g., -d0) Options, a query without the optional parameter (e.g. When no options are given, -acdgkmur is assumed. Some options may work correctly only with the latest kernels. recent WD "Passport" models and recent NexStar-3 enclosures. Many newer (2008Īnd later) USB drive enclosures now also support "SAT" (SCSI-ATAĬommand Translation) and therefore may also work with hdparm.Į.g. Subsystem and the older IDE driver subsystem. Interfaces supported by the Linux SATA/PATA/SAS "libata" SYNOPSIS top hdparm ĭESCRIPTION top hdparm provides a command line interface to various kernel Hdparm - get/set SATA/IDE device parameters HDPARM(8) System Manager's Manual HDPARM(8) NAME top
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