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Date: Sun, 23 Sep 2001 07:28:23 -0700 (PDT)
From: David Hedley <david@hedley.org>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/30762: Ability to specify max UDMA level
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>Number:         30762
>Category:       kern
>Synopsis:       Ability to specify max UDMA level
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          wish
>Submitter-Id:   current-users
>Arrival-Date:   Sun Sep 23 07:30:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     David Hedley
>Release:        4.4-RELEASE
>Organization:
Intelligent Network Technology Ltd
>Environment:
>Description:

It would be nice to be able to specify a maximum UDMA level with the ATA driver.

e.g. I use the Promise TX2/100 card which supports up to UDMA5, however running it at this speed in my current chassis generates many CRC errors. I would like to be able to force it to use UDMA4 max.
>How-To-Repeat:

>Fix:

I currently manually patch ata_umode in dev/ata/ata-all.c

>Release-Note:
>Audit-Trail:
>Unformatted:

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