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Date:      Fri, 23 May 2008 16:43:16 +0200
From:      "Julian Stacey" <jhs@berklix.org>
To:        phoemix@harmless.hu
Cc:        freebsd-current@freebsd.org
Subject:   Re: ata mode at startup 
Message-ID:  <200805231443.m4NEhGTM090324@fire.js.berklix.net>
In-Reply-To: Your message "Fri, 23 May 2008 15:56:35 %2B0200." <20080523155635.054f5ec4@twoflower.in.publishing.hu> 

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phoemix@harmless.hu wrote:
> Hello,
> As known, FreeBSD sets the highest supported ATA mode, but sometimes it's
> inproper, since the disk fails to work in this mode. This will be obsolate =
> by
> recent SATA drives, but PATA is still in use :)
> I've though of the possibility of adding an "atamodetab" rc script, with wh=
> ich
> the administrator could specify the disk modes to set on startup.
......^^^^^^^^^^^^^ ....

No good waiting for an admin to manually edit a table:
An admin cant edit till FreeBSD boots.
FreeBSD fails to boot on some older laptops eg
	http://www.berklix.com/~jhs/hardware/digital/
	http://www.berklix.com/~jhs/hardware/laptops/dell_latitude_xpi_p133st/
unless one pre-knows FreeBSD magic like 	
	loader.conf hw.ata.ata_dma=0
	http://www.berklix.com/~jhs/hardware/laptops/#loader.conf

A table in src/ that would automatically recognise flakey ATA hardware
& reduce ambitious FreeBSD so it could boot, would be nice.

> I've already got a sketch for this script that I use, but I'd like to ask, =
> does
> it worth the effort working on it a bit more, and adding it to the core OS?=
>  I
> think this would be a quite useful feature to have.

Julian
-- 
Julian Stacey: BSDUnixLinux C Prog Admin SysEng Consult Munich www.berklix.com
	Mail just Ascii plain text.  HTML & Base64 text are spam.



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