hdparm.conf man page on ElementaryOS

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hdparm.conf(5)		   hdparm configuration file		hdparm.conf(5)

       hdparm.conf - Debian configuration file for hdparm

       This  is	 the  default  configuration  for  hdparm for Debian.  It is a
       rather simple script, so please follow the following guidelines :)  Any
       line that begins with a comment is ignored - add as many as you like.

       Note  that  an in-line comment is not supported.	 If a line consists of
       whitespace only (tabs, spaces, carriage return), it will be ignored, so
       you can space control fields as you like.  ANYTHING ELSE IS PARSED!!

       This  means  that  lines	 with stray characters or lines that use non #
       comment characters will be interpreted by  the  initscript.   This  has
       probably	 minor,	 but  potentially  serious, side effects for your hard
       drives, so please follow the guidelines.	 Patches to improve flexibilty

       Please  read  /usr/share/doc/hdparm/README.Debian for notes about known
       issues, especially if you have an MD array.

       Note that if the init script causes boot problems, you can pass	'nohd‐
       parm' on the kernel command line, and the script will not be run.

       Setting	an  option  outside  of	 one of the stanzas enables it for all

       If an option is listed twice, the second instance replaces the first.

       /sbin/hdparm is not run unless a block of the form:

       DEV {




       exists.	This blocks will cause /sbin/hdparm OPTIONS  DEV  to  be  run.
       Where  OPTIONS  is  the concatenation of all options previously defined
       outside of a block and all options defined with in the block.

       -q be quiet

       -a sector count for filesystem read-ahead
	      read_ahead_sect = 12

       -A disable/enable the IDE drive's read-lookahead feature
	      lookahead = on

       -b bus state
	      bus = on

       -B apm setting
	      apm = 255

       -B apm setting when on battery
	      apm_battery = 127

       -c enable (E)IDE 32-bit I/O support - can be any of 0,1,3
	      io32_support = 1

       -d disable/enable the "using_dma" flag for this drive
	      dma = off

       -D enable/disable the on-drive defect management
	      defect_mana = off

       -E cdrom speed
	      cd_speed = 16

       -k disable/enable the "keep_settings_over_reset" flag for this drive
	      keep_settings_over_reset = off

       -K disable/enable the drive's "keep_features_over_reset" flag
	      keep_features_over_reset = on

       -m sector count for multiple sector I/O
	      mult_sect_io = 32

       -P maximum sector count for the drive's internal prefetch mechanism
	      prefetch_sect = 12

       -r read-only flag for device
	      read_only = off

       -s Enable/disable the power-on in standby feature
	      poweron_standby = off

       -S standby (spindown) timeout for the drive
	      spindown_time = 24

       -u interrupt-unmask flag for the drive
	      interrupt_unmask = on

       -W Disable/enable the IDE drive's write-caching feature
	      write_cache = off

       -X IDE transfer mode for newer (E)IDE/ATA2 drives
	      transfer_mode = 34

       -y force to immediately enter the standby mode

       -Y force to immediately enter the sleep mode

       -Z Disable the power-saving function of certain Seagate drives

       -M Set the acoustic management properties of a drive

       -p Set the chipset PIO mode

       --security-freeze Freeze the drive's security status

       --security-unlock Unlock the drive's security
	      security_unlock = PWD

       --security-set-pass Set security password
	      security_pass = password

       --security-disable Disable drive locking

       --user-master Specifies which password to select
	      security_mode = u

       --security-mode Set the security mode
	      security_mode = h

       Root file systems.
	      Please see README.Debian for details.  ROOTFS = /dev/hda

       Blocks beginning with the keyword 'command_line' instead	 of  a	device
       identifier  are no longer supported for backwards compatibility by this
       version of hdparm.  Options must be  introduced	by  a  correct	device
       identifier instead so that they will be applied when the device becomes

       hdparm was written by Mark Lord <mlord@pobox.com> The init  script  and
       configuration   file   are   currently	maintained   by	 Stephen  Gran
       <sgran@debian.org>, but are the result of the work of many people.

       This manual page was created by Stephen Gran <sgran@debian.org> for the
       Debian GNU/Linux system (but may be used by others).

Stephen Gran			August 10, 2005			hdparm.conf(5)

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