From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: can't mount RAID-1 btrfs after reboot Date: Fri, 14 Aug 2009 11:34:42 +0200 Message-ID: <4A852FB2.2030205@wpkg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed To: linux-btrfs@vger.kernel.org Return-path: List-ID: I can't mount RAID-1 btrfs after reboot (well, sort of). Using 2.6.31-rc5 and btrfs-progs 0.19, I created a RAID-1 fileystem using these command line options: # mkfs.btrfs -L btrfs-data -m raid1 -d raid1 /dev/sda4 /dev/sdb4 After which I was able to mount the filesystem with either of the below (or both): # mount /dev/sda4 /mnt/btrfs-sda4 # mount /dev/sdb4 /mnt/btrfs-sdb4 After a reboot, I'm no longer able to mount the filesystem from /dev/sda4: # mount /dev/sda4 /mnt/btrfs/ Mount command complains and doesn't mount it and says I can find more info in dmesg: Btrfs loaded device label btrfs-data devid 1 transid 67 /dev/sda4 btrfs: failed to read the system array on sda4 btrfs: open_ctree failed I'm able to mount the filesystem by using /dev/sdb4: # mount /dev/sdb4 /mnt/btrfs/ After which I can unmount it, and use /dev/sda4 to mount the filesystem: # umount /dev/sdb4 # mount /dev/sda4 /mnt/btrfs/ Does it make sense? It behaved like this also with some earlier kernels. -- Tomasz Chmielewski http://wpkg.org