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 1Nel74-0005Zh-1k for garchives@archives.gentoo.org; Tue, 09 Feb 2010 08:06:26 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 6A526E104E for ; Tue, 9 Feb 2010 08:06:25 +0000 (UTC) Received: from smtpq2.tb.mail.iss.as9143.net (smtpq2.tb.mail.iss.as9143.net [212.54.42.165]) by pigeon.gentoo.org (Postfix) with ESMTP id C8186E0E20 for ; Tue, 9 Feb 2010 07:47:43 +0000 (UTC) Received: from [212.54.42.133] (helo=smtp2.tb.mail.iss.as9143.net) by smtpq2.tb.mail.iss.as9143.net with esmtp (Exim 4.69) (envelope-from ) id 1Nekow-00036a-Dq for gentoo-user@lists.gentoo.org; Tue, 09 Feb 2010 08:47:42 +0100 Received: from 5353258a.cable.casema.nl ([83.83.37.138] helo=data.hosts.antarean.org) by smtp2.tb.mail.iss.as9143.net with esmtp (Exim 4.69) (envelope-from ) id 1Nekov-0002MO-NC for gentoo-user@lists.gentoo.org; Tue, 09 Feb 2010 08:47:41 +0100 Received: from localhost (localhost [127.0.0.1]) by data.hosts.antarean.org (Postfix) with ESMTP id 2C9602901E for ; Tue, 9 Feb 2010 08:47:41 +0100 (CET) X-Virus-Scanned: amavisd-new at antarean.org Received: from data.hosts.antarean.org ([127.0.0.1]) by localhost (data.hosts.antarean.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KRJt+2nYDZZt for ; Tue, 9 Feb 2010 08:47:41 +0100 (CET) Received: from eve.localnet (eve.hosts.antarean.org [10.1.5.100]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by data.hosts.antarean.org (Postfix) with ESMTPS id 0D11327888 for ; Tue, 9 Feb 2010 08:47:41 +0100 (CET) From: "J. Roeleveld" To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] 1-Terabyte drives - 4K sector sizes? -> bar performance so far Date: Tue, 9 Feb 2010 08:47:40 +0100 User-Agent: KMail/1.12.3 (Linux/2.6.30-gentoo-r5; KDE/4.3.3; x86_64; ; ) References: <5bdc1c8b1002070827i14f59047k39a695900ebe9889@mail.gmail.com> <4B705D6B.1090803@gmail.com> <58965d8a1002081234n97b4b5apa88e262dc53b3d9a@mail.gmail.com> In-Reply-To: <58965d8a1002081234n97b4b5apa88e262dc53b3d9a@mail.gmail.com> 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: <201002090847.40385.joost@antarean.org> X-ZiggoSMTP-MailScanner-Information: Please contact the ISP for more information X-ZiggoSMTP-MailScanner-ID: 1Nekov-0002MO-NC X-ZiggoSMTP-MailScanner: Found to be clean X-ZiggoSMTP-MailScanner-SpamCheck: geen spam, SpamAssassin (niet cached, score=-2.599, vereist 5, autolearn=not spam, BAYES_00 -2.60) X-ZiggoSMTP-MailScanner-From: joost@antarean.org X-Spam-Status: No X-Archives-Salt: 395dafda-129f-4a71-8cc5-eb4388a21896 X-Archives-Hash: c6513749b8c2726820e09e207ba1a289 On Monday 08 February 2010 21:34:01 Paul Hartman wrote: > On Mon, Feb 8, 2010 at 12:52 PM, Valmor de Almeida wrote: > > Mark Knecht wrote: > > [snip] > > > >> This has been helpful for me. I'm glad Valmor is getting better > >> results also. > > > > [snip] > > > > These 4k-sector drives can be problematic when upgrading older > > computers. For instance, my laptop BIOS would not boot from the toshiba > > drive I mentioned earlier. However when used as an external usb drive, I > > could boot gentoo. Since I have been using this drive as backup storage > > I did not investigate the reason for the lower speed. I am happy to get > > a factor of 8 in speed up now after you did the research :) > > > > Thanks for your postings. > > Thanks for the info everyone, but do you understand the agony I am now > suffering at the fact that all disk in my system (including all parts > of my RAID5) are starting on sector 63 and I don't have sufficient > free space (or free time) to repartition them? :) I am really curious > if there are any gains to be made on my own system... > > Next time I partition I will definitely pay attention to this, and > feel foolish that I didn't pay attention before. Thanks. > I have similar disks in my new system and was lucky that I was still in the testing phase and hadn't filled the disks yet. After changing the partitions to start at sector 64, the creation of the RAID-5 set went from around 22 hours to 9 hours. I also get a much higher throughput (in the range of at least 4 times faster), so I would recommend doing the change if you can. I now only need to figure out the best way to configure LVM over this to get the best performance from it. Does anyone know of a decent way of figuring this out? I got 6 disks in Raid-5. Thanks, Joost Roeleveld