From mboxrd@z Thu Jan 1 00:00:00 1970 From: Luca Berra Subject: Re: 16 HDDs too much for RAID6? Date: Fri, 7 Mar 2008 09:41:47 +0100 Message-ID: <20080307084146.GA9653@percy.comedia.it> References: <20080306100128.8daad6bd.taeuber@bbaw.de> <20080306094559.GA29734@skl-net.de> <20080306115559.63ac361d.taeuber@bbaw.de> <20080306161621.GD32242@skl-net.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <20080306161621.GD32242@skl-net.de> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Thu, Mar 06, 2008 at 05:16:21PM +0100, Andre Noll wrote: >On 11:55, Lars T=E4uber wrote: >> monosan:~ # cat /etc/mdadm.conf=20 >> DEVICE partitions >> ARRAY /dev/md2 level=3Draid1 UUID=3Dd9d31de2:e6dbd3c3:37c7ea09:882a6= 4e5 >> ARRAY /dev/md3 level=3Draid1 UUID=3Da8687183:a79e514c:ca492c4b:ffd43= 84f >> ARRAY /dev/md4 level=3Draid6 num-devices=3D16 UUID=3D8d596319:4d21db= a3:3871bccf:5b90a66d > >Does it help to list only the 16 devices that are used for the array, >i.e. something like > > DEVICE /dev/sd[a-p] i hope kernel will pevent you from doing something this stupid, but i a= m not that sure. if you wanna check if the problem is device selection a more appropriat= e line would be DEVICE /dev/mapper/mpath* or DEVICE /dev/dm-[0-9] /dev/dm-1[0-5] >I think this is what is confusing mdadm. Your "DEVICE partitions" >line instructs mdadm to consider all devices in /proc/partitions, >so it finds both sdy and sdi. in this case i believe the error message would be different >> Is there a way to get more verbose infos or debug this anyhow? you could try with the --verbose option and post the results here. also could you check if the minor number of /dev/dm-* are really unique= ? in case this yelds no result we will have to add some more printf in Assemble.c. Regards, L. --=20 Luca Berra -- bluca@comedia.it Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \ -- 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