Am 14.04.2014 00:15, schrieb Rodrigo Rivas:
On Sun, Apr 13, 2014 at 10:23 PM, Maximilian Bräutigam <m@xbra.de> wrote:
Please, help me! ;( Are there other options to investigate my RAID or to even temporarily mount it to get some data? What went wrong here? What can I do? Why is a simple crash making my RAID unusable? Can I use other tools for a recovery?
I've had (a lot of) luck in the past with "btrfs restore" [1]. It will not fix your volumes, but it will copy whatever it can read from the disk to a safe place. If it is a RAID1 both disks should hold the same data, so you can try btrfs-restoring first one and then the other...
HTH
Hi all, thanks for your replies. I tried several things according to [1]. 1) btrfs restore Was not really working, only a few GB of my data. 2) then I realised some "transid verify failed", so I did a btrfs-zero-log DEVICE 3) From here I was able to mount my volume again – so I could save my latest photos. When I mount my volume with autodefrag,compress=lzo,subvolid=0, I end up with a "rw" mounted device. Then I copy some data with e.g. rsync and it turns to "ro" at some point. I found this while I wanted to scrub the devices, but this is naturally only working for writable mounts. And it is still – I don't know why – not possible to boot from the device again. Things to do next: try again with recovery option. If this is not working: roll back to ext4. But I really like the idea behind COW, subvolumes, no partitioning, RAID and everything in one fs. Snapshots against user mistakes, RAID against disk failure – perfectly save, if there was not the fs itself. So far, so good. The problem is, that even if I can come back to a fully working device or RAID again, the work load (that I have to put in just because my computer crashed) is much to high for something profound like a home dir. Unfortunately, the only thing I learned to far is to give btrfs some more decades to age. More ideas are of course welcome. Best wishes and thanks again, Max [1] https://unix.stackexchange.com/questions/32440/how-do-i-fix-btrfs