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Linux 2.6 - man page for hdparm.conf (linux section 5)

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

NAME
       hdparm.conf - Debian configuration file for hdparm

DESCRIPTION
       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 welcome.

       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 'nohdparm' 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 drives.

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

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

       DEV {

       option

       option

       }

       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.

OPTIONS
       -q be quiet
	      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 = 128

       -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
	      standby

       -Y force to immediately enter the sleep mode
	      sleep

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

       -M Set the acoustic management properties of a drive
	      acoustic_management

       -p Set the chipset PIO mode
	       chipset_pio_mode

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

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

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

       --security-disable Disable drive locking
	      security_disable

       --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 available.

AUTHOR
       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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