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
-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
You can use straight hdparm commands in this config file
as well - the set up is ugly, but it keeps backwards compatibility.
Additionally, it should be noted that any blocks that begin with
the keyword 'command_line' are not run until after the root filesystem
is mounted.
This is done to avoid running blocks twice. If you need
to run hdparm to set parameters for your root disk, please use the
standard format.
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).
