atp2
September 3rd, 2014, 05:43 AM
After a failed upgrade to Ubuntu 14.04.1, my machine would not boot at all (nothing at all on the screen after BIOS), so I re-installed without reformatting the disks. Now it gets further along, but still cannot boot, instead getting stuck in some sort of mdadm loop.
When the boot starts, first I see the error: diskfile writes are not supported (http://askubuntu.com/questions/468466/why-this-occurs-error-diskfilter-writes-are-not-supported) message due to bug 1274320 (https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1274320). But AFAICT, that isn't actually the cause of my boot problems, as after a few seconds the boot proceeds, and I see kernel dmesg output scroll by. But then it gets stuck saying this over and over again, seemingly forever:
Incrementally starting RAID arrays...
mdadm: CREATE user root not found
mdadm: CREATE group disk not found
Incrementally started RAID arrays.
No matter how long I let it run, it just sits there occasionally repeating more of the same. Help? What should I look at or try to further diagnose and fix this?
I used the Boot Repair disk to record info about my system, it is here: http://paste.ubuntu.com/8135727/
It's not obvious to mee from that Boot Repair info, but this machine has three disks for RAID-1 (one hot spare) and all three disks are partitioned exactly the same way, like this:
sda1, 150 GB, ext4, / (root partition)
sda5, 8 GB, swap
sda6, 842 GB, xfs, /data
I also posted additional info about how the failed upgrade and how the box got to this state about a week ago in my Upgrade to 14.04.1 failed, RAID-1 mdadm, Boot Repair (http://ubuntuforums.org/showthread.php?t=2241201) thread.
When the boot starts, first I see the error: diskfile writes are not supported (http://askubuntu.com/questions/468466/why-this-occurs-error-diskfilter-writes-are-not-supported) message due to bug 1274320 (https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1274320). But AFAICT, that isn't actually the cause of my boot problems, as after a few seconds the boot proceeds, and I see kernel dmesg output scroll by. But then it gets stuck saying this over and over again, seemingly forever:
Incrementally starting RAID arrays...
mdadm: CREATE user root not found
mdadm: CREATE group disk not found
Incrementally started RAID arrays.
No matter how long I let it run, it just sits there occasionally repeating more of the same. Help? What should I look at or try to further diagnose and fix this?
I used the Boot Repair disk to record info about my system, it is here: http://paste.ubuntu.com/8135727/
It's not obvious to mee from that Boot Repair info, but this machine has three disks for RAID-1 (one hot spare) and all three disks are partitioned exactly the same way, like this:
sda1, 150 GB, ext4, / (root partition)
sda5, 8 GB, swap
sda6, 842 GB, xfs, /data
I also posted additional info about how the failed upgrade and how the box got to this state about a week ago in my Upgrade to 14.04.1 failed, RAID-1 mdadm, Boot Repair (http://ubuntuforums.org/showthread.php?t=2241201) thread.