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)