From owner-freebsd-questions@FreeBSD.ORG Wed Apr 11 18:58:17 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C2D6416A402 for ; Wed, 11 Apr 2007 18:58:17 +0000 (UTC) (envelope-from kline@tao.thought.org) Received: from tao.thought.org (dsl231-043-140.sea1.dsl.speakeasy.net [216.231.43.140]) by mx1.freebsd.org (Postfix) with ESMTP id 3F75013C4AD for ; Wed, 11 Apr 2007 18:58:17 +0000 (UTC) (envelope-from kline@tao.thought.org) Received: from tao.thought.org (localhost [127.0.0.1]) by tao.thought.org (8.13.8/8.13.1) with ESMTP id l3BIxgfG043138; Wed, 11 Apr 2007 11:59:43 -0700 (PDT) (envelope-from kline@tao.thought.org) Received: (from kline@localhost) by tao.thought.org (8.13.8/8.13.1/Submit) id l3BIxfRn043137; Wed, 11 Apr 2007 11:59:41 -0700 (PDT) (envelope-from kline) Date: Wed, 11 Apr 2007 11:59:41 -0700 From: Gary Kline To: Jules Gilbert Message-ID: <20070411185941.GA42753@thought.org> References: <46192C1B.4060706@u.washington.edu> <20070408221017.23f060ea.breath@unix.net> <3B8A60E3-9600-47A5-934F-7DACB78F50B7@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3B8A60E3-9600-47A5-934F-7DACB78F50B7@gmail.com> User-Agent: Mutt/1.4.2.2i X-Organization: Thought Unlimited. Public service Unix since 1986. X-Of_Interest: Observing twenty years of service to the Unix community Cc: Yuri Grebenkin , freebsd-questions@freebsd.org Subject: Re: Automatic means for spinning down disks available? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Apr 2007 18:58:17 -0000 On Tue, Apr 10, 2007 at 09:06:15PM -0400, Jules Gilbert wrote: > Boy, do I want answers too! > > We have HD's that run 24X7. And I don't want to turn them off, I > just want them to sleep quietly until needed. We have lot's of RAM, > thus plenty of cache space. > > Our machines are all blades. (Does this matter? I don't know.) > IBMs and Super-Micros. > > We spend zillions of bucks on electricity; We use these machines > 24X7 now, but soon will only need them about 12 hours a day. Is 24X7 > operation the optimal strategy? > > What's the best course here, wrt electric costs, and wrt disk failures? > Re disc failures, I recommend investing as many hours/days as necessay to decide what it (abs) critical. Config files from as many lcations as reqired, e.g. If you have a tape drive, copy the critical files there. Buy as many 200-300GB dics as required to cross-backup your important, but not necessarily critical files. And cron ssh backups N times daily... N >=1. (I bup some files twice a day.) Power is not going to do anything but get more costly; at the same time, if you lost all your data in a *poof*, how much would you be willing to pay to have things back? --A parenthetical note: yes, cross-backing up does pay off. Recently, I mv'd a file (innocently, I thought) *over* another files and lost a few hour technical work. LUCKILY, I had the original file on my laptop!!!! {Whew} I almost lways save mods by RCS { ci -l }... but .... -- > --jg > > > > On Apr 8, 2007, at 2:10 PM, Yuri Grebenkin wrote: > > >Just wonder if it's better for an HDD not to spindown at all. > >Maybe it's safer to spin in peace than to park/launch? > >What do you think? > > > >>Hello again all, > >> I was wondering if there was an automatic, and possibly timed > >>means to > >>spin down disks available in either ports or the base system, by > >>chance. > >> Just trying to cut down on energy use, and increase my disks' > >>lives :). > >>TIA, > >>-Garrett > >_______________________________________________ > >freebsd-questions@freebsd.org mailing list > >http://lists.freebsd.org/mailman/listinfo/freebsd-questions > >To unsubscribe, send any mail to "freebsd-questions- > >unsubscribe@freebsd.org" > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" -- Gary Kline kline@thought.org www.thought.org Public Service Unix