From: Mark Lord <lkml@rtr.ca>
To: Robert Hancock <hancockr@shaw.ca>
Cc: Christoph Pleger <Christoph.Pleger@cs.uni-dortmund.de>,
linux-kernel@vger.kernel.org
Subject: Re: PATA-disk named sda
Date: Fri, 06 Jul 2007 13:58:32 -0400 [thread overview]
Message-ID: <468E82C8.7060204@rtr.ca> (raw)
In-Reply-To: <468E5420.7090605@shaw.ca>
Robert Hancock wrote:
>..
> Currently the DMA, multi-sector mode, etc. are not controllable with
> hdparm with libata. libata is designed to use the fastest settings
> possible by default. In a lot of cases this messing with hdparm was only
> needed because of stupidity with the old IDE code (like DMA not being
> automatically enabled if the low-level driver was built modular).
Actually, most of the hdparm flags were put there to help test the IDE
subsystem and to help debug the much stranger hardware it had to deal with.
"DMA off by default" was a Linus Torvalds request, to help ensure data safety
with all of the weird and wonderful crap pre-standardization.
Cheers
next prev parent reply other threads:[~2007-07-06 17:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.VMMtK2yPXE5gkxuIC8MWb1aPBiQ@ifi.uio.no>
[not found] ` <fa.23lYEA4r0kfTVDJ1AKcxSE4vGKA@ifi.uio.no>
[not found] ` <fa.DRDWDh+VAXx84D/6XHgY6h2wB+E@ifi.uio.no>
2007-07-06 14:39 ` PATA-disk named sda Robert Hancock
2007-07-06 17:58 ` Mark Lord [this message]
2007-07-06 18:47 ` Bartlomiej Zolnierkiewicz
2007-07-06 18:09 ` Bartlomiej Zolnierkiewicz
2007-07-06 8:21 Christoph Pleger
2007-07-06 9:13 ` Suren Karapetyan
2007-07-06 9:36 ` Christoph Pleger
2007-07-06 9:58 ` Suren Karapetyan
2007-07-06 17:55 ` Mark Lord
2007-07-07 18:33 ` Jan Engelhardt
2007-07-06 9:52 ` Alejandro Riveira Fernández
2007-07-06 10:11 ` Uwe Kiewel
2007-07-06 10:18 ` Alan Cox
2007-07-06 12:30 ` Christoph Pleger
2007-07-06 14:40 ` Gabriel C
2007-07-06 15:19 ` Alan Cox
2007-07-07 21:40 ` Rene Herman
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