The patch of https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/942106/comments/5 does not work in following case: - Ubuntu 12.04 - partitionable RAID-1 on two complete disks sda and sdb, giving array md0. Root partition is md0p1, swap partition is md0p2. - One disk physically removed before boot. - boot degraded arrays is requested
The system reports Mount failed, /dev/disk/my-uuid/<uniqueid> busy. This /dev/disk/my-uuid/<uniqueid> points to /dev/sda1. Solution: add a second wait_for_udev at the end of the local-premount/mdadm script. This results in the script: ---------------- . /scripts/mdadm-functions . /scripts/functions wait_for_udev degraded_arrays || exit 0 mountroot_fail || panic "Dropping to a shell." wait_for_udev ----------------- Hypothetical explanation: mountroot_fail finds a degraded RAID-1 array and starts it with one disk, creating device /dev/md0. The function ends. Next, the 'local' script tries to mount the root partition, but udev did not yet have time to detect the partitions and create the corresponding devices md0p1 and md0p1, and change the links in /dev/disk/by-uuid to these detected partitions. The links in /dev/disk/by-uuid still point to /dev/sda[12], which are locked by mdadm for md0. The added wait_for_udev lets udev find the partitions md0p1 and md0p2 and change the links in /dev/disk/by-uuid before trying to mount the root partition. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/942106 Title: software raid doesn't assemble before mount on boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/942106/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
