From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Richard B. Pyne" Subject: system startup hangs Date: Wed, 07 Dec 2011 15:38:05 -0700 Message-ID: <4EDFEACD.3010806@kinfolk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids 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me if I ask stupid questions, I am fairly new to linux raid and most of the documentation I can find is severely outdated and/or written for someone who already understands linux raid.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 at which point it just hangs. No more disk access, no more messages. The system has 5 WD Caviar Black 500GB drives. I did the linux install on the first drive and built the other 4 drives into the raid system, planning to move everything (except the /boot partition) on to the raid array and then repartition everything except the /boot partition on the first drive and add it to the raid. I currently have md0 for / md1 for /home md2 for /usr md3 for /var and md4 on which I plan on running lvm to allocate to other system needs. Any advice, insights and/or direction will be greatly appreciated.