Man Linux: Main Page and Category List


       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
       ’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

       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 = 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

       -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 <> The init script and
       configuration  file  are   currently   maintained   by   Stephen   Gran
       <>, but are the result of the work of many people.

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