From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Richard B. Pyne" Subject: Re: system startup hangs Date: Wed, 07 Dec 2011 16:24:52 -0700 Message-ID: <4EDFF5C4.10602@kinfolk.org> References: <4EDFEACD.3010806@kinfolk.org> <20111208100033.69c42b6c@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20111208100033.69c42b6c@notabene.brown> Sender: linux-raid-owner@vger.kernel.org Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 12/7/2011 4:00 PM, NeilBrown wrote: > On Wed, 07 Dec 2011 15:38:05 -0700 "Richard B. Pyne" > wrote: > >> Please forgive me if I ask stupid questions, I am fairly new to linux >> raid and most of the documentation I can find is severely outdated >> and/or written for someone who already understands linux raid. >> >> I have successfully built a set raid 6 array with 4 drives and have >> copied my system partitions onto the raid drives. I then reboot with >> root=/dev/md0. >> >> Everything looks like it is working right up through: >> >> md/raid:md0 raid level 6 active with 4 out of 4 devices, algorithm 2 >> md0: detected capacity change from 0 to 1000131788 >> md: autorun DONE. >> md0: unknown partition table >> EXT3-fs (md0): error: couldn't mount because of unsupported optional >> features >> EXT2-fs (md0): error: couldn't mount because of unsupported optional >> features >> EXT4-fs (md0): mounted filesystem with ordered data mode. Opts: (null) >> VFS: Mounted root (ext4 filesystem) readonly on device 9:0. >> freeing unused kernel memory: 472k freed > It looks like the array got setup fine, the filesystem on it was mounted, and > then .... nothing. > > I think at this point it should be running /sbin/init. > > It doesn't seem like a RAID problem exactly. Maybe something when wrong when > you copying the system partition into the RAID, but that is just a guess. > > At this point we probably need to know at least what distro you are using. > There is probably some way to turn on tracing in the initrd and the boot > sequence, but it is different for different distros. > > NeilBrown > I am using lunar linux. ( http://lunar-linux.org ). The kernel is 3.1.4 x86_64 confiugred with raid autodetect and the raid sets were built with -e 0.90. --Richard