From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Hardy Subject: Re: ludicrous speed: raid6 reconstruction Date: Fri, 03 Feb 2006 13:56:04 -0800 Message-ID: <43E3D174.3090608@h3c.com> References: <20060203211558.GA7559@amd64.of.nowhere> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20060203211558.GA7559@amd64.of.nowhere> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids I saw this on my array, and other(s) have reported it as well. Apparently the reconstruction speed algorithm doesn't understand that it's not syncing all the blocks and hilarity ensues. I believe that was it, anyway Either that or you really have a hell of a server :-) -Mike jurriaan wrote: > Personalities : [linear] [raid0] [raid1] [raid5] [raid4] [raid6] > md0 : active raid6 sdh1[7] sdg1[6] sdf1[5] sde1[4] sdd1[3] sdc1[2] sdb1[1] sda1[0] > 1465175424 blocks level 6, 64k chunk, algorithm 2 [8/8] [UUUUUUUU] > [==================>..] resync = 91.0% (222239104/244195904) finish=0.0min speed=7369041K/sec > bitmap: 23/233 pages [92KB], 512KB chunk > I am reminded of Spaceball's 'ludicrous speed' here. This is after a > reboot from 2.6.16-rc1-mm3 (where the array was built) to 2.6.16-rc1-mm5 > (where rebuilding continued thanks to the bitmap).