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 34D2C1381F3 for ; Fri, 13 Sep 2013 21:47:45 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 6F635E0C84; Fri, 13 Sep 2013 21:47:37 +0000 (UTC) Received: from mail-qc0-f178.google.com (mail-qc0-f178.google.com [209.85.216.178]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 59FA2E0C26 for ; Fri, 13 Sep 2013 21:47:36 +0000 (UTC) Received: by mail-qc0-f178.google.com with SMTP id r5so1267581qcx.23 for ; Fri, 13 Sep 2013 14:47:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=Sat31oMNyOpqhlTiRebroO+IMEBmypEgCyzEFBXz6kE=; b=NjO56G9BpdYK3k8AmcuYKITzkSuXWGFEuhjR0IuvNarHaBrX+xWKfvXPz9/m25XzKE RBw7YqOhalj/5OKAU72tuvfWLOz3Riol/LFA4DmAX7GbBIovSSPgzrUKCMBE08xTochN ohb3FWdrWtkvf2LwQsIkcrStnhWqrx5fA4MpKapjtIB97rZrl5wMDk6VqAfJuIThToEl UbKjQsZeaqRDz4yLqK/L13vQpFwTxfs51tgvosf7iB1tpYCAX6LqsrvePcbM3V7rnHOe LbFdsxE0Y+7Fkz1fvvwhNzhEZNcnG/0u+1CVkFmEmejIyei4biDUOVUSPgC4KkFbB0M9 YoKA== 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 X-Received: by 10.229.51.69 with SMTP id c5mr29265728qcg.24.1379108855570; Fri, 13 Sep 2013 14:47:35 -0700 (PDT) Received: by 10.140.25.83 with HTTP; Fri, 13 Sep 2013 14:47:35 -0700 (PDT) In-Reply-To: <5233792D.7040900@orlitzky.com> References: <5233792D.7040900@orlitzky.com> Date: Fri, 13 Sep 2013 14:47:35 -0700 Message-ID: Subject: Re: [gentoo-user] {OT} Need a new server From: Grant To: Gentoo mailing list Content-Type: text/plain; charset=ISO-8859-1 X-Archives-Salt: 4c217270-fe7a-4062-953a-169f4d99c4a4 X-Archives-Hash: 99383f99fa1392e0a45572b0da61a604 >> It's time to switch hosts. I'm looking at the following: >> >> Dual Xeon E5-2690 >> 32GB RAM >> 4x SSD RAID10 >> >> This would be my first experience with multiple CPUs and RAID. Advice >> on any of the following would be greatly appreciated. >> >> Is the Gentoo Software RAID + LVM guide the best place for RAID >> install info if I'm not using LVM and I'll have a hardware RAID >> controller? >> >> http://www.gentoo.org/doc/en/gentoo-x86+raid+lvm2-quickinstall.xml > > No need. Hardware RAID is handled on the RAID controller. Gentoo won't > even know about it. I had no idea. How awesome. So the entire array shows up as /dev/sda when using a real hardware controller? Just enable an extra kernel config option or two and it works? >> Can I count on this system to keep running if I lose an SSD? > > Yes. RAID10 both stripes and mirrors. So you can lose one, and it's > definitely mirrored on another drive. Now you have three drives. If you > lose another one, is it mirrored? Well, maybe, if you're lucky. There's > a 2/3 chance that the second drive you lose will be one of the remaining > mirror pair. > > Recommendation: add a hot spare to the system. Would the hot spare be in case I lose 2 drives at once? Isn't that extraordinarily unlikely? Are modern SSDs reliable enough to negate the need for mirroring or do they still crap out? - Grant