linux-kernel - Re: Abysmal PATA IDE performance

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Date:	Wed, 08 Nov 2006 22:53:28 -0500
From:	Stephen Clark <Stephen.Clark@...lark.us>
To:	Björn Steinbrink <B.Steinbrink@....de>
CC:	Mark Lord <lkml@....ca>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Abysmal PATA IDE performance

Björn Steinbrink wrote:

>On 2006.11.08 19:35:45 -0500, Stephen Clark wrote:
>  
>
>>Mark Lord wrote:
>>
>>    
>>
>>>Remove the drivers/ide stuff from you system and let libata (ata_piix)
>>>manage the ICH7.  That should speed things up quite a bit.
>>>
>>>-ml
>>>
>>>
>>>
>>>      
>>>
>>Isn't already enabled?
>>
>>ata_piix 0000:00:1f.2: version 2.00
>>ata_piix 0000:00:1f.2: MAP [ P0 P2 IDE IDE ]
>>ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 233
>>ata: 0x170 IDE port busy
>>PCI: Setting latency timer of device 0000:00:1f.2 to 64
>>ata1: SATA max UDMA/133 cmd 0x1F0 ctl 0x3F6 bmdma 0xFFA0 irq 14
>>scsi0 : ata_piix
>>
>>    
>>
>
>Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
>ide: Assuming 33MHz system bus speed for PIO modes; override with
>idebus=xx
>ide0: I/O resource 0x1F0-0x1F7 not free.
>ide0: ports already in use, skipping probe
>Probing IDE interface ide1...
>hdc: HTS721060G9AT00, ATA DISK drive
>
>Appears first and that's where the other driver has taken control of the
>drives. I had the same issue on my thinkpad, getting rid of the whole
>IDE stuff solved the problem (because the other drivers does no longer
>grab the drive).
>
>This ThinkWiki entry should apply to your laptop just as well, just
>replace /dev/hda with /dev/hdc.
>http://www.thinkwiki.org/wiki/Problems_with_SATA_and_Linux#No_DMA_on_system_hard_disk
>
>  
>
>>also this laptop has nothing on ide0 - both the harddrive and dvdrom are 
>>on ide1.
>>is this confusing things?
>>    
>>
>
>Probably ide0 is pure SATA, while ide1 has the PATA adapters (just a
>guess).
>
>Björn
>
>  
>
Thank Bjorn,

I tried this and the kernel couldn't find the root volumegroup - so i 
got a kernel panic.
I am not sure on how to tell the system the volumegroup is now on sd? 
This is a
fc6 installation.

Steve

-- 

"They that give up essential liberty to obtain temporary safety, 
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty 
decreases."  (Thomas Jefferson)



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