[lug] RH Linux download + hdparm

[Greg Horne]

I'm running Red Hat 7.0 with kernel 2.2.16-22, so do I set the option in 
/etc/rc.d/rc.local?

Greg


>From: Calvin Dodge <caldodge at fpcc.net>
>Reply-To: lug at lug.boulder.co.us
>To: lug at lug.boulder.co.us
>Subject: Re: [lug] RH Linux download + hdparm
>Date: Thu, 18 Oct 2001 14:52:29 -0600
>
>On Thu, Oct 18, 2001 at 08:03:04PM +0000, Greg Horne wrote:
> > DMA = 0
> > Timing buffered disk reads:  64 MB in 13.35 seconds = 4.79 MB/sec
> > DMA = 1
> > Timing buffered disk reads:  64 MB in  6.75 seconds = 9.48 MB/sec
>
>That's verra nice!
>
> > Major improvment on my K6!  Slowed down the Pentium 200 by 1.07 MB/sec.
> > Does the DMA setting stay after running hdparm or do I have to make it
> > permanent elsewhere?  Thanks for all the info Calvin!
>
>One does one's best.
>
>I believe the setting stays until 1) a driver error, or 2) rebooting. Check 
>out the hdparm manual (option "-k" in particular) to see about preserving 
>the DMA setting during error recovery.
>
>To make it permanent after rebooting ...
>
>IIRC, old RH distros didn't have any pertinent configuration options built 
>in (or maybe I just wasn't aware of them at the time - I've been using RH 
>for about 3.5 years, so I was a Linux newbie when I first installed RH 
>5.1). On those systems I'd put the appropriate hdparm command in 
>/etc/rc.d/rc.local.
>
>At some point that config info WAS built in - the file 
>/etc/sysconfig/harddisks was the place to go to set such hard drive 
>options.
>
>I _believe_ current kernels set DMA by default.
>
>So ... what distro, version and kernel are you using?
>
>Calvin
>
>--
>Calvin Dodge
>Certified Linux Bigot (tm)
>http://www.caldodge.fpcc.net
>_______________________________________________
>Web Page:  http://lug.boulder.co.us
>Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug


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