Re: DMA is turned off on my HDD
On Mon, Jul 28, 2008 at 17:48:42 +0300, Anton Liaukevich wrote:
> Florian Kulzer wrote:
>> On Sun, Jul 27, 2008 at 23:05:15 +0300, Anton Liaukevich wrote:
>>> Florian Kulzer wrote:
>>>> On Sun, Jul 27, 2008 at 16:57:19 +0300, Anton Liaukevich wrote:
>>>>> Florian Kulzer wrote:
>>>>>> On Wed, Jul 23, 2008 at 20:59:09 +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)
>>>> [...]
>>>>
>>>>>>> Today I upgraded my linux kernel to 2.6.25-2-686, but problem
>>>>>>> hasn't been solved yet.
>>>> [...]
>>>>
>>>>> I installed hdparm long ago and it says that dma if off, moreover
>>>>> hdparm can't turn it on:
>>>>>
>>>>> leva:/home/anthony/admin# hdparm -d1 /dev/hda
>>>>>
>>>>> /dev/hda:
>>>>> setting using_dma to 1 (on)
>>>>> HDIO_SET_DMA failed: Operation not permitted
>>>>> using_dma = 0 (off)
>>
>> [...]
>>
>> Hopefully there will be an error message somewhere that clears this up a
>> little. Try to reboot and then run:
>>
>> dmesg | grep grep -Ei 'ata|ide|amd74xx'
>>
>> Furthermore, there could be relevant messages very early in the boot
>> process; you might have to use ScrollLock plus pen and paper to catch
>> them (or set up logging to a serial console).
>>
> I have tried command "dmesg | grep -Ei 'ata|ide|amd74xx'", suggested by
> you (after rebooting and logging in console (nor kdm that I use
> usually)).
> Please read output in the attachment. Thank you for help.
[...]
> [ 1.642452] Uniform Multi-Platform E-IDE driver
OK, that seems to come from ide_core.
> [ 1.642530] ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> [ 1.643173] Probing IDE interface ide0...
> [ 2.058474] hda: WDC WD1200JB-00EVA0, ATA DISK drive
> [ 2.730008] Probing IDE interface ide1...
> [ 3.592777] hdc: SONY CD-RW CRX320E, ATAPI CD/DVD-ROM drive
> [ 4.264276] ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> [ 4.264276] ide1 at 0x170-0x177,0x376 on irq 15
> [ 13.612015] hdc: ATAPI 52X DVD-ROM CD-R/RW drive, 2048kB Cache
Some driver (ide_generic?) takes control of the devices before libata is
loaded. Check the output of "cat /proc/interrupts" to see which module
has IRQs 14 and 15.
> [ 14.218581] libata version 3.00 loaded.
> [ 14.740018] NFORCE2: IDE controller (0x10de:0x0065 rev 0xa2) at PCI slot 0000:00:09.0
> [ 14.740306] NFORCE2: port 0x01f0 already claimed by ide0
> [ 14.740378] NFORCE2: port 0x0170 already claimed by ide1
The nforce2 driver cannot take ove rthe devices => no DMA.
I can think of a few more things to try, but I don't know how "safe"
they are:
- put amd74xx as the first non-comment line into /etc/modules
- boot with "blacklist=ide_generic" appended to the kernel command line
- likewise, try "libata.dma=3" at boot (may be dangerous)
- check the kernel documentation for "libata.force=..." (can be really
dangerous)
- check if the amd74xx module is included in your initrd:
zcat /boot/initrd.img-$(uname -r) | cpio --quiet -t | grep -E '(ide|ata|amd)[^/]*\.ko'
- build your own kernel with amd74xx compiled in
--
Regards, | http://users.icfo.es/Florian.Kulzer
Florian |
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