[anthonyl@uvaga.by: Re: DMA is turned off on my HDD]
Please keep the discussion on list.
Did Florian's suggestion help?
----- Forwarded message from Anton Liaukevich <anthonyl@uvaga.by> -----
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From: Anton Liaukevich <anthonyl@uvaga.by>
Date: Sun, 27 Jul 2008 16:32:52 +0300
To: Chris Bannister <mockingbird@earthlight.co.nz>
Subject: Re: DMA is turned off on my HDD
Chris Bannister wrote:
> On Wed, Jul 23, 2008 at 08:59:09PM +0300, Anton Liaukevich wrote:
>> Anton Liaukevich wrote:
>>> In several days I discovered that DMA is turned off on my HDD (fsck
>>> sayed it while Debian booting). Please, help me turn on DMA mode.
>>>
>>> My hardware:
>>> motherboard: Epox 8RDA3I rev 3.3 (nForce 2 Ultra)
>>> hdd: WD1200JB (ide, 120gb)
>>> cpu: Sempron 2200 (k7)
>>>
>>> My software:
>>> Debian lenny
>>> kernel: linux 2.6.24-1-686
>>> bootloader: grub 0.97-41
>>>
>>>
>> Today I upgraded my linux kernel to 2.6.25-2-686, but problem hasn't
>> been solved yet.
>
> All I can suggest is:
>
> In the file /boot/grub/menu.lst, edit the line:
> # kopt=root=/dev/hda1 ro
>
> to read:
> # kopt=root=/dev/hda1 dma=on ro
>
> of course make sure that "/dev/hda1" is correct for your setup. If you
> only have one HDD installed then it probably is already correct.
>
> Then run update-grub
>
> Install hdparm:
> aptitude install hdparm
>
> reboot
>
> then run:
> hdparm /dev/hda
>
> and see if dma is turned on, e.g:
>
> root@box:~# hdparm /dev/hda
> [..]
> using_dma = 1 (on)
> [..]
>
> If instead, it outputs "using_dma = 0 (off)" then I'm sorry, but I
> am unable to help further. You may want to run the hdparm command BEFORE
> you edit your menu.lst to ensure that the dma is actually off and you
> are not being deceived in some way. :-)
>
I have changed /boot/grub/menu.lst as you said:
# kopt=root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro
Now, after update-grub command, all my boot stanzas have 'dma=on' options.
For example:
title Debian GNU/Linux, kernel 2.6.25-2-686
root (hd0,2)
kernel /boot/vmlinuz-2.6.25-2-686
root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro
initrd /boot/initrd.img-2.6.25-2-686
savedefault
Unfortunately, DMA hasn't turned on after system reboot (I has checked it
using hdparm).
Additionally, I give you full menu.lst file in attachment.
# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-legacy-doc/.
## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not change this entry to 'saved' or your
# array will desync and will not let you boot your system.
default saved
## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10
# Pretty colours
color cyan/blue white/blue
## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
# password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret
password --md5 $1$kLE2a$kaeh1q3GPQC38zBZB3IG7.
#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#
#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST
### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below
## DO NOT UNCOMMENT THEM, Just edit them to your needs
## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro
## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,2)
## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true
## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=true
## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=
## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=true
## Xen hypervisor options to use with the default Xen boot option
# xenhopt=
## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0
## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(single-user) single
# altoptions=(single-user mode) single
## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all
## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true
## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false
## should update-grub add savedefault to the default options
## can be true or false
# savedefault=true
## ## End Default Options ##
title Debian GNU/Linux, kernel 2.6.25-2-686
root (hd0,2)
kernel /boot/vmlinuz-2.6.25-2-686 root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro
initrd /boot/initrd.img-2.6.25-2-686
savedefault
title Debian GNU/Linux, kernel 2.6.25-2-686 (single-user mode)
lock
root (hd0,2)
kernel /boot/vmlinuz-2.6.25-2-686 root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro single
initrd /boot/initrd.img-2.6.25-2-686
savedefault
title Debian GNU/Linux, kernel 2.6.24-1-686
lock
root (hd0,2)
kernel /boot/vmlinuz-2.6.24-1-686 root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro
initrd /boot/initrd.img-2.6.24-1-686
savedefault
title Debian GNU/Linux, kernel 2.6.24-1-686 (single-user mode)
lock
root (hd0,2)
kernel /boot/vmlinuz-2.6.24-1-686 root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro single
initrd /boot/initrd.img-2.6.24-1-686
savedefault
title Debian GNU/Linux, kernel 2.6.24-1-486
lock
root (hd0,2)
kernel /boot/vmlinuz-2.6.24-1-486 root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro
initrd /boot/initrd.img-2.6.24-1-486
savedefault
title Debian GNU/Linux, kernel 2.6.24-1-486 (single-user mode)
lock
root (hd0,2)
kernel /boot/vmlinuz-2.6.24-1-486 root=UUID=683f90cf-5af5-4946-b90d-c69541f15966 dma=on ro single
initrd /boot/initrd.img-2.6.24-1-486
savedefault
### END DEBIAN AUTOMAGIC KERNELS LIST
# This is a divider, added to separate the menu items below from the Debian
# ones.
title Other operating systems:
root
# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/hda1
title Microsoft Windows XP Professional
root (hd0,0)
savedefault
makeactive
chainloader +1
----- End forwarded message -----
--
Chris.
======
"One, with God, is always a majority, but many a martyr has been burned
at the stake while the votes were being counted." -- Thomas B. Reed
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