hdparm tuning

[Daniel Jones]

Anthony Krishock wrote:
> Thanks, Luke..
>
> I take your statement to mean that I could step through one of the numerous
> examples of hdparm tuning on the web (Such as
> http://tldp.org/LDP/solrhe/Securing-Optimizing-Linux-RH-Edition-v1.3/chap6se
> c74.html) without causing any damage?
>
> Also.. for my setup, sda is the Windows XP side (NTFS). Should I only mess
> with the linux side (sdb)?
>
> Thanks
>
> Tony
>
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> Today's Topics:
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>    1. Re: dmraid performance tuning? (Luke Yelavich)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 14 Apr 2008 08:26:47 +1000
> From: Luke Yelavich <luke.yelavich at canonical.com>
> Subject: Re: dmraid performance tuning?
> To: ataraid-list at redhat.com
> Message-ID: <20080413222647.GA8333 at marin.yelavich.home>
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> On Mon, Apr 14, 2008 at 01:30:03AM EST, Anthony Krishock wrote:
>   
>> That said.. I have one question. Is it possible to tune a dmraid disk in
>>     
> the
>   
>> same way that you would using hdparm? If so.. What are the steps involved?
>>     
>
> Yes, you would use the device node of the disk or disks that are part of the
> array. So hdparm -d 1 /dev/sda would enable dma for sda, the first drive in
> the array. I don't think trying to do this with the device mapper nodes
> would work.
>   
AFAIK only a small subset of the hdparm parameters work for sd devices.  
I think you'd be better off with sdparm.

-- 
Dan
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