From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1NiFXg-0001qN-2F for garchives@archives.gentoo.org; Thu, 18 Feb 2010 23:12:20 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id E97D7E09D1; Thu, 18 Feb 2010 23:12:11 +0000 (UTC) Received: from mail-bw0-f219.google.com (mail-bw0-f219.google.com [209.85.218.219]) by pigeon.gentoo.org (Postfix) with ESMTP id A949BE09D1 for ; Thu, 18 Feb 2010 23:12:11 +0000 (UTC) Received: by bwz19 with SMTP id 19so739244bwz.26 for ; Thu, 18 Feb 2010 15:12:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:from:to:subject:date :user-agent:references:in-reply-to:mime-version:content-type :content-transfer-encoding:message-id; bh=gIrb0rn7vFTJ68EqXEBanuHpSduteEqU600Wl49xxrc=; b=L1y1LGGKqgCdqMyiYGd+XHjwEomdZMObUQGiabDpvYIBF2fyqnxNrE+P49N0A1xzVp QZX4n9EJ3JckZOzXGKjWSQj4caJA4R1ffqRj86ARAt6CmeX3heHlpDaQ1VyE9g5KW/i5 0DXpCX+nrxndSqHW5u9G9ucTeja8d+Ee29FLE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=from:to:subject:date:user-agent:references:in-reply-to:mime-version :content-type:content-transfer-encoding:message-id; b=aXungVFRNx10jLSUXGwf0SuxLR62SePsqLl3/ExEAvFbEPD+fXkwnmg0psBBwRUh8a ddTaA9805S9XDwEnDgpj2MDIpQH/EJwtzowAcZ0D4YJKCpgqwNAjqIZ7dXE9DQiyFFXf ZQzAEdNktePRtJX0GDjddg956yj+6qXLmWdCA= Received: by 10.103.76.37 with SMTP id d37mr7469121mul.105.1266534728456; Thu, 18 Feb 2010 15:12:08 -0800 (PST) Received: from energy.localnet (ip-80-226-1-7.vodafone-net.de [80.226.1.7]) by mx.google.com with ESMTPS id y2sm7506363mug.19.2010.02.18.15.12.07 (version=TLSv1/SSLv3 cipher=RC4-MD5); Thu, 18 Feb 2010 15:12:07 -0800 (PST) From: Volker Armin Hemmann To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: hdparm -d 1 -X 68 ? Date: Fri, 19 Feb 2010 00:12:04 +0100 User-Agent: KMail/1.13.0 (Linux/2.6.31.12r4; KDE/4.4.0; x86_64; ; ) References: <201002182157.21166.michaelkintzios@gmail.com> In-Reply-To: Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201002190012.04839.volkerarmin@googlemail.com> X-Archives-Salt: ca7ec223-4aa5-42ae-b59f-30fc358d0bc8 X-Archives-Hash: cf63f7114f69c78339232c38d547188e On Donnerstag 18 Februar 2010, walt wrote: > On 02/18/2010 01:57 PM, Mick wrote: > > On Thursday 18 February 2010 14:33:38 James wrote: > >> Should I put the drive into udma4 mode? > >> > >> If so, wouldn't I use: > >> > >> hdparm -d 1 -X 68 /dev/hda > > > > According to the hitachi manual (who made this drive for IBM) the > > DJNA-3XXXXX series has a Ultra ATA Mode 2 (33.3 MB per second) > > capability. So the kernel is not lying in this case and you can trust > > hdparm in what it shows. I suggest you leave alone. > > Shouldn't the drive just refuse any command that it can't do? udma4 has not additional commands. It is just faster. And no, some drivers don't. With desastrous results. Don't set the udma mode. Ever.