From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 69B7C1381F3 for ; Sat, 31 Aug 2013 01:50:57 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 7407FE0EBC; Sat, 31 Aug 2013 01:50:50 +0000 (UTC) Received: from mail-lb0-f170.google.com (mail-lb0-f170.google.com [209.85.217.170]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 853BBE0EB7 for ; Sat, 31 Aug 2013 01:50:49 +0000 (UTC) Received: by mail-lb0-f170.google.com with SMTP id w7so2311079lbi.29 for ; Fri, 30 Aug 2013 18:50:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:content-type; bh=2Lr5sCqKPEVACmoXJ/CY6qk2wwPY64+Zw0IwapyYXbw=; b=jRQsmHtctcVH0KvfnfKsM5TVlG1MJnmH/KuOroo4hQpOGnLoONNyG4gTeLz1ozYWlY PEHfQikxQ8ejQvGvqsw+vKlKwu/Xf0nAoamIGuC1lH9yBJpWWvpHSnoBD8iP698xIX5H UGnZezdfeYRHbNWaX3NXHOn6krM4hgzFrq7KJoeThAe+nrQMGSzxXHzg9gN+E5Cms/iS Uaj3FhEGaQPLOvjxPaqKQ74dw+XVjF/zmyCs6zi897mczzwD5Z5HcE7kVqB8HR961seB IY+BVcpyKITFV5KJNJiQHIuXot0Kf7yfCBHh89zjy36SxvuV3wdj7kK9jXzz8h6XCw03 pXLQ== Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-amd64@lists.gentoo.org Reply-to: gentoo-amd64@lists.gentoo.org MIME-Version: 1.0 X-Received: by 10.112.128.166 with SMTP id np6mr10275236lbb.7.1377913847617; Fri, 30 Aug 2013 18:50:47 -0700 (PDT) Sender: freemanrich@gmail.com Received: by 10.114.180.202 with HTTP; Fri, 30 Aug 2013 18:50:47 -0700 (PDT) In-Reply-To: References: <521E4E74.9020005@jamadots.com> Date: Fri, 30 Aug 2013 21:50:47 -0400 X-Google-Sender-Auth: RIprEYTWBbouCstzfMFivBXE8h4 Message-ID: Subject: Re: [gentoo-amd64] Re: Hard drive (installation) From: Rich Freeman To: gentoo-amd64@lists.gentoo.org Content-Type: text/plain; charset=ISO-8859-1 X-Archives-Salt: 0e578f5d-e6cc-4111-95e2-a73bdb2d1730 X-Archives-Hash: c0631a1001521b79454ca12a64b32dba On Fri, Aug 30, 2013 at 9:40 PM, Duncan <1i5t5.duncan@cox.net> wrote: > Rich Freeman posted on Thu, 29 Aug 2013 15:56:10 -0400 as excerpted: >> You did mention USB3, as did others in this thread. Hopefully this is >> obvious to all, but under no circumstances should you try to run an OS >> on USB2 or less. > > People did it for years before USB3 and SATA2/3 arrived... Anybody with a motherboard supporting USB2 almost certainly had a motherboard supporting PATA at a faster transfer rate. I do agree that random access speed does lower the effective rate. My hard drives are running at 3GB/s transfer rates each on a dedicated channel, and yet they're probably not any faster than they would have been under PATA (assuming one drive per cable). Hopefully one of these days there will be a decent SSD cache option for Linux. Bcache is still fairly experimental, and I'm not sure how well it performs in practice with btrfs - plus it is a device layer and not filesystem layer implementation (ie if you have mirrored drives you end up with mirrored cache which seems a bit dumb, especially if the mirrors end up being on separate partitions on the same device). Rich