

A value of 255 tells hdparm to disable Advanced Power Power management is attained with a setting of 1, and the highest I/O performance Values 128 through 254 (which do not permit spin-down). Possible settings range from values 1 through 127 (which permit spin-down), and Means aggressive power management and a high value means better performance.

B Get/set Advanced Power Management feature, if the drive supports it. A Get/set the IDE drive´s read-lookahead feature (usually ON by default). Separate built-in read-ahead function, which augments this filesystem (software)

Performance in sequential reads of large files, by prefetching additional blocks inĪnticipation of them being needed by the running task. a Get/set sector count for filesystem (software) read-ahead. d) will query (get) the device state, and with a parameter When no options are given, -acdgkmur is assumed. Some options may work correctly only with the latest recent WD "Passport" modelsĪnd recent NexStar-3 enclosures. Translation) and therefore may also work with hdparm. (2008 and later) USB drive enclosures now also support "SAT" (SCSI-ATA Command Linux SATA/PATA/SAS "libata" subsystem and the older IDE driver subsystem. Hdparm - get/set SATA/IDE device parametersĭESCRIPTION hdparm provides a command line interface to various kernel interfaces supported by the
