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 1Q8awY-00066e-6f for garchives@archives.gentoo.org; Sat, 09 Apr 2011 16:23:26 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 45DE5E0549; Sat, 9 Apr 2011 16:22:02 +0000 (UTC) Received: from mail-iw0-f181.google.com (mail-iw0-f181.google.com [209.85.214.181]) by pigeon.gentoo.org (Postfix) with ESMTP id 13CF7E0549 for ; Sat, 9 Apr 2011 16:22:01 +0000 (UTC) Received: by iwn2 with SMTP id 2so5747515iwn.40 for ; Sat, 09 Apr 2011 09:22:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=eZoakaBfwKwUQ5oJWcAijOnvHIEiCdWox5ZIPOPw/ps=; b=thQspQPADGjvefeOLPpII28jY9weDSLAK+osIifQzrjwya0Nh5Kh+RDc6XpXUImoXL HAS0XO9DP3SshUVGInB85Gy6E43dMNeCUG7MgQK3R/PK4mu2zuP7PAiJUU4OnsojQRoR n0FmdvAjQjlXvo8jmh+O+W5cLWhvbki7ZD4LI= 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 :cc:content-type:content-transfer-encoding; b=oqezZ+CSeLc0ONGggTIUjdF24aPzYZ6GEd1OlLY8NgZsmBeDvYrwg/TjJ5aba0l4/d bJyWitGVhLF+LBg0IAZFxuxKnNNOKFfnIffaUQ/v/c2CqJMXAtwJL7kzj0GwEhznyQJw iHG0ctXZwYgUd7zOwBLp1qHWQ6X4hiPkQfDlk= 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 10.43.45.66 with SMTP id uj2mr4703096icb.514.1302366121387; Sat, 09 Apr 2011 09:22:01 -0700 (PDT) Received: by 10.42.167.74 with HTTP; Sat, 9 Apr 2011 09:22:01 -0700 (PDT) In-Reply-To: <4DA06030.50703@gmail.com> References: <4D9D9071.2050504@gmail.com> <201104091319.10422.alan.mckinnon@gmail.com> <4DA0465D.2000409@gmail.com> <20110409125358.28F5738DC@data.antarean.org> <4DA06030.50703@gmail.com> Date: Sat, 9 Apr 2011 09:22:01 -0700 Message-ID: Subject: Re: [gentoo-user] LVM for data drives but not the OS From: Mark Knecht To: gentoo-user@lists.gentoo.org Cc: Dale Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: X-Archives-Hash: 96696b4e80b69b5b355573d50d2c1566 On Sat, Apr 9, 2011 at 6:33 AM, Dale wrote: > > I think I am too. =C2=A0Since folks know I am disabled anyway, I went to = the Dr > the other day. =C2=A0The new meds aren't perfect but it is better. =C2=A0= When I go > back, he may change it to another med. =C2=A0He just wanted to try this f= irst. > =C2=A0It does sort of help me to get a better grasp on things tho. =C2=A0= Sort of weird > in a way. =C2=A0That part is like a side effect. =C2=A0:/ > > I'm just needing to find me a good LARGE drive to put in here. =C2=A0I'm = checking > out the reviews but it just seems most have issues. =C2=A0May just have t= o buy > one, work the stuffing out of it with a script or something to see if it > holds up. > > I see some of the large drives spin slower, some a lot slower. =C2=A0Give= n the > density of the data, are they about as fast as a drive that spins at 7200= ? > =C2=A0My main drives for my OS and the large drive I already have turn at= 7200 > rpms. =C2=A0I'm just curious if that would be slower or because of the de= nsity of > the data, it doesn't matter. =C2=A0I get about 80 to 100Mb/sec on my curr= ent > drives. =C2=A0I have 3gbs/sec drives which is what my mobo maxes out at. = =C2=A0I > thought about getting a 6Gb/sec just in case I upgrade my mobo later. > > My data drive mostly has audio/video stuff but does contain pictures I to= ok > with my camera and some documents, mostly saved web pages or OOo stuff. = =C2=A0My > 750Gb drives plays audio/video stuff just fine, even the HD stuff. =C2=A0= I just > wouldn't want to get a drive that is slow enough to cause pauses and such= . > > I see newegg has 3Tb drives too. =C2=A0he he he he =C2=A0O_O > > Thoughts? > > Dale Good thread Dale. I've been busy this week so I finally read the whole thing, start to finish, this morning. Good LVM info which I expect I'll use one of these days myself. Personally II think one thing you might want to consider, given your concerns about not losing important personal data, is to investigate RAID with the same level of focus that you are doing with LVM. Instead of buying very large drives (3TB) you can build a large RAID6 or RAID5 out of smaller 500GB or 1TB drives. Personally my home compute server, which runs 4 copies of Windows 7 in VMWare and Virtualbox for trading in the futures market, is set up this way: - Five 500GB WD RAID Edition physical drives - /boot is just a 100MB partition on /dev/sda, but I've saved more partition space on other drives with various kernel images should /dev/sda fail. - Gentoo is on a 50GB 5-drive RAID1. That's a LOT of redundancy. I can technically lose 4 drives and the system continues to work fine. For the OS that's essentially unkillable short of someting like a power supply failure taking out all the drives or the MB. - /home is on a 5-drive RAID6 using 50GB partitions. That gives me a total of 150GB storage personally for my pictures, videos, code, etc., and allows 2 drives to fail without losing data. - /VirtualMachines is on a 5-drive RAID6 using the remaining 400GB on each drive, so that's 1.2TB with redundancy of a 2-drive loss being protected. I then have a few external eSATA hard drives that I use for backups. /home to one pair, /VirtualMachines to another pair. I think if I was to set up this system from scratch again I might consider one large RAID6 using 450GB and putting /home in one LV and /VirtualMachines in another. The advantage would be that over time, if my personal needs increased, I could resize the LVs more easily than resizing the RAIDs. (Which is also possible but beyond the scope of this thread...) Anyway, it's just another idea about how you can use the same hardware in a different configuration. Five 1TB drives as a RAID6 gives you both 3TB of storage as well as far more reliability. One 3TB drive by itself can die and everything is gone. Congrats on your learning experience and I hope it continues to be successful for you. Cheers, Mark