What does -a 1 option do?
>From: "Jonathan M. Prigot" <[EMAIL PROTECTED]>
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>To: [EMAIL PROTECTED]
>Subject: Re: [Cooker] 32 bit i/o for hard drive
>Date: Mon, 05 Jun 2000 21:14:20 -0400
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>David Walluck wrote:
>AFAIK, you are asked at install time whether you want to enable hard
>drive optimizations, and warned that it can do some nasty things. The
>default answer is "No". If you answer "Yes" it puts a line in
>/etc/sysconfig/system that enables hdparm -a1 -c1 -d1. According to
>messages here, -d1 may cause system lockups.
>---
> >
> > Brian Fleischman wrote:
> > >
> > > I do can do a -c1 just fine also. If I do a -d1 (dma)...locks
> > up...harddrive
> > > light on constantly, even with the -X66 or -X68. I have a WD 20.5
> > ata/66 7200 rpm
> > > drive. I wonder what's up with the dma stuff.
> > >
> > > -Brian
> >
> > Hi. Why are hard drive optimizations on per default??? I have to add
> > "nohdparm" to the command-line. On my WDC 18G drive, it hangs. I'm
> > having serious problems with DMA enabled on this drive anyway (VP3
> > chipset). So I turned off "Use DMA by default" in the kernel. Still,
> > hard drive optimizations apparently can't be enabled on WDC dricves.
> > I've seen this problem reported many times and I'm experiencing serious
> > problems myself.
> >
> > --
> > Sincerely,
> >
> > David Walluck
> > <[EMAIL PROTECTED]>
>--
>Jonathan M. Prigot
>
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