From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen Subject: Re: Roadmap for md/raid ??? Date: Mon, 19 Jan 2009 22:08:29 +0100 Message-ID: <20090119210829.GA6143@rap.rap.dk> References: <18763.7881.300921.177207@notabene.brown> <20090111181413.GA24988@lazy.lzy> <18803.55804.905420.503480@nbeee.brown> <20090119181919.GB4290@lazy.lzy> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Return-path: Content-Disposition: inline In-Reply-To: <20090119181919.GB4290@lazy.lzy> Sender: linux-raid-owner@vger.kernel.org To: Piergiorgio Sartor Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Mon, Jan 19, 2009 at 07:19:19PM +0100, Piergiorgio Sartor wrote: > Hi, > > Let's assume we have a RAID-5 with 7 disks. > Each time an HD fails, we will replace it with a > larger one, since this will be cheaper. > Once we replaced 3 HDs, with could use the unused > space in RAID-5 again. > Unfortunately, with the current features, we will > have to wait to fail all the 7 disks. Nah, when you have 2 new disks, you can put the excessive space into a new raid, which should be able to grow, with further new disks to arrive. But in principle you are right, it would be nice to use dirfferent age/size disks in a clever way. Best regards Keld