kern/140251: [ata] [patch] add UDMA5 support to Intel SCH

Alexander Motin mav at
Tue Dec 22 12:50:08 UTC 2009

The following reply was made to PR kern/140251; it has been noted by GNATS.

From: Alexander Motin <mav at>
To: Tomokazu HARADA <tharada at>
Cc: bug-followup at
Subject: Re: kern/140251: [ata] [patch] add UDMA5 support to Intel SCH
Date: Tue, 22 Dec 2009 14:45:35 +0200

 Tomokazu HARADA wrote:
 > It runs,
 > but DMA limited to UDMA33. This is another problem
 > in ata-all.c. I modified ata-all.c, it goes UDMA100 well.
 You are wrong here. As this controller doesn't implement cable
 detection, we have to ask drive about it. Probably your drive reports
 40-wire cable.
 Alexander Motin

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