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List:       gentoo-sparc
Subject:    Re: [gentoo-sparc] DMA on Sun Blade 100
From:       "David S. Miller" <davem () redhat ! com>
Date:       2004-08-18 19:36:56
Message-ID: 20040818123656.48fa3945.davem () redhat ! com
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On Wed, 18 Aug 2004 12:27:19 -0400
Kumba <kumba@gentoo.org> wrote:

> > On my Blade 100, I've had DMA turned on (via hdparm) ever since I 
> > installed Gentoo last December:
> 
> It's my belief that the DMA issue doesn't occur if you use the OEM drive 
> shipped with the blade.  I stuck a 20GB WD drive into it, and got fs 
> corruption up the wazoo once, but I've since moved that drive to another 
> box and it's ran like a champ.  The original 15GB drive never had a 
> problem w/ DMA.  Not exactly sure why.

I've had the exact opposite experience.  The provided drive
gave the occaisional IDE corruption but using newer current
generation IDE disks work fine with no corruption with DMA
enabled.

It is definitely connected to the kind of disk you have
attached to the ALI controller, that much is for sure.

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