From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konstantin Olchanski Subject: Re: raid5, media scans and stripe-wise resync Date: Mon, 25 Oct 2004 15:02:12 -0700 Sender: linux-raid-owner@vger.kernel.org Message-ID: <20041025220212.GA30613@sam.triumf.ca> References: <1098733380.5399.39.camel@duxeon.cobite.com> <200410252029.i9PKTEN26833@www.watkins-home.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <200410252029.i9PKTEN26833@www.watkins-home.com> To: Guy Cc: 'David Mansfield' , 'Jure Pe_ar' , linux-raid@vger.kernel.org List-Id: linux-raid.ids On Mon, Oct 25, 2004 at 04:29:09PM -0400, anybody wrote: > 1 disk has a bad sector and another disk fails, game over. On a single-disk, 1 bad sector kills just the one unlucky file. On a degraded RAID0 or RAID5, 1 bad sector kills the filesystem. On a healthy RAID0 or RAID5, 2 bad sectors on different disks kill the filesystem. Does this make sense? RAID is less fault tolerant than a single disk? -- Konstantin Olchanski Data Acquisition Systems: The Bytes Must Flow! Email: olchansk-at-triumf-dot-ca Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada