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Subject: Re: HPT374 RAID bus controller SATA, only UDMA 33
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Lukas Postupa <postupa@gmx.de>
Cc: linux-kernel@vger.kernel.org
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Date: Thu, 15 Dec 2005 12:31:55 +0000
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On Iau, 2005-12-15 at 02:33 +0100, Lukas Postupa wrote:
> Hi,
> 
> my SAMSUNG 250GB drive connected to HPT374 RAID bus controller (SATA) is
> only working at UDMA 33.

The HPT37x driver in the old IDE code assumes cable detection support.
If someone uses a SATA bridge that gets this wrong then you don't get
over 33Mhz.

> Does anyone have a solution to fix this bottleneck?

Force ata66 support on. See Documentation/ide.txt