Date: Fri, 29 Apr 2005 00:57:49 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: bms@spc.org Cc: woodycarey@hotmail.com Subject: Re: VIA M1000 mini-itx system installation woes - WRITE_DMA error - cabling? Message-ID: <20050429.005749.99254012.imp@bsdimp.com> In-Reply-To: <20050427104015.GB5585@empiric.icir.org> References: <BAY102-F266489846554E24E0A0F95C9210@phx.gbl> <d86b487305042701114ba75409@mail.gmail.com> <20050427104015.GB5585@empiric.icir.org>
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In message: <20050427104015.GB5585@empiric.icir.org>
Bruce M Simpson <bms@spc.org> writes:
: On Wed, Apr 27, 2005 at 10:11:16AM +0200, Arjan Van Leeuwen wrote:
: > After you've installed the system, insert that line into
: > /boot/loader.conf, and load up "atacontrol mode 0 udma33 udma33" as
: > early as possible during the boot (try using /etc/rc.early, for
: > example) to get it up to speed again.
:
: Some drives have firmware tweaks downloadable from the manufacturer which
: can be used to force the drive to never negotiate a faster data rate than
: UDMA33 (or whatever the cable you are using is capable of). I'm thinking
: of Samsung in particular here.
:
: However, I agree, this is *annoying*; I don't know of 80 + 4 conductor cables
: for 2.5" ATA drives. If anyone knows of such things then please do let me
: know, as I've had significant problems with a development system at work which
: is Mini-ITX form factor based with a 2.5" drive.
FWIW, my laptop successfully copes:
ad0: 57231MB <TOSHIBA MK6022GAX HB002A> at ata0-master UDMA100
that's a 2.5" drive. I believe that a standard 40 -> 44 connector
connected on an 80 pin cable would do the trick. I know I've had some
success with that here at work.
Warner
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