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 1Nbybc-0004MY-Um for garchives@archives.gentoo.org; Mon, 01 Feb 2010 15:54:29 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id DD754E0984; Mon, 1 Feb 2010 15:53:42 +0000 (UTC) Received: from mail-gx0-f211.google.com (mail-gx0-f211.google.com [209.85.217.211]) by pigeon.gentoo.org (Postfix) with ESMTP id B5F7EE0984 for ; Mon, 1 Feb 2010 15:53:42 +0000 (UTC) Received: by gxk3 with SMTP id 3so4435365gxk.6 for ; Mon, 01 Feb 2010 07:53:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=3qvCIjTCmOOu2IDftus/46mQsvZiGDYCL5h1HPtp9bY=; b=aU9NUNdvFgwvAepAXQrmX97z+FCkS43cPI0fzI4nGlAhlbg3PFBzwiOljEGWitN6lz sdYx9Xc4em4My6si0G8TnqRwoRTzJ5vCojgm2aR4wb3gYK9UXh4ueMWhBwZzJggMQGhX 9cu39NgX6IsNjNDODjqfIDktCApECwB3jLIOA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=EmOHXUI8I21CwanSvrYkKmNCubOcf6i59OGNlEjVAbQlmjaAx1budBGzisKd6SGJkv 0nwA+O+POTvd9KOrB2BWPQC3Hwo+D1FYlzrdzKk1xkFQbP+r9C9/8GlV3X8xFwHKu/2m ei90tz3GshCumZFJOPc25rW4AMkr/VyLhTFJs= 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 Received: by 10.101.134.17 with SMTP id l17mr5583388ann.74.1265039622299; Mon, 01 Feb 2010 07:53:42 -0800 (PST) In-Reply-To: <201002011545.45816.joost@antarean.org> References: <201002011258.49893.joost@antarean.org> <45D49DDE-E5D2-4FDA-8B4D-7470AAC4B39D@stellar.eclipse.co.uk> <201002011545.45816.joost@antarean.org> Date: Mon, 1 Feb 2010 07:53:42 -0800 Message-ID: <854dca5c1002010753o14414c04ob92510439cc2907f@mail.gmail.com> Subject: Re: [gentoo-user] Raid 5 creation is slow - Can this be done quicker? From: Kyle Bader To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=UTF-8 X-Archives-Salt: 87241982-fa92-4f31-ba66-78cc8c0f2a67 X-Archives-Hash: 694e84e89c497a987c0b5fedd3380f87 >> It would be interesting to know whether hardware RAID would behave any >> differently or allow the sync to perform in the background. I have >> only 1.5TB in RAID5 across 4 x 500gb drives at present; IIRC the >> expansion from 3 x drives took some hours, but I can't recall the >> initial setup. LSI, 3ware and Areca hardware raid controllers are capable of doing a background init but their performance is impacted, I can't speak on other controllers as I haven't used them before. I've built many RAID6 arrays with all three controllers - 8x 1TB and 8x 1.5TB and I'll usually start a foreground init and let them run overnight because it does take a long time. Also, RAID10 is much faster to get up and running because it doesn't have to calculate parity. -- Kyle