From mboxrd@z Thu Jan 1 00:00:00 1970 From: jahammonds prost Subject: Re: Array Power Management Date: Mon, 7 Sep 2009 06:37:16 -0700 (PDT) Message-ID: <883434.71116.qm@web55807.mail.re3.yahoo.com> References: <292245.77763.qm@web55804.mail.re3.yahoo.com> <70ed7c3e0909070257y4bec456h6de9cc6d2981c8ce@mail.gmail.com> <20090907125522.GL1933@hamsu.tarvainen.info> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20090907125522.GL1933@hamsu.tarvainen.info> Sender: linux-raid-owner@vger.kernel.org To: Tapani Tarvainen , "Majed B." Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids > You don't needo to unmount it: just leave it mounted, and it will aut= omatically spin up when accessed. > I've been doing just that with a backup (rsnapshot) server for a some= time, works just fine. That's great news, I was hoping there would be something simple. > In my case the total power consumption went down by over 50% (th> e disks stay powered down by about 85% of the time). I don't have my figures here at the moment, but I'm hoping to save a bi= g chunk like that too. I'm spinning 12 x 320GB disks on my file server,= 15 x 500GB disk on one media server, and 7 x 1TB disks (and climbing -= Got to lovr array expansion) on my new media server. Since it's really= only mainly in use between 5pm and midnight, being able to spin down t= he disks would be a huge plus (or rather, minus on the electric bill). = I had considered just shutting down the server, but I'm probably going = to be (re)installing MythTV when .22 is released, so one (or more) of t= he servers will end up being storage for that, so I would never really = know when the array is going to be needed. > I simply do it with every individual disk of the array. I was tempted to try that, but I wasn't sure if that would cause issues= with md or not. I did some googling - found quite a bit on spinning do= wn single drives, but noone had really=A0anything to say about arrays (= maybe I should have binged instead...:) ) Thanks to all for the suggestions. --=20 Tapani Tarvainen -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at=A0 http://vger.kernel.org/majordomo-info.html =20 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html