I have av machine which has btrfs raid1 root which I cannot boot anymore. The problem seems to be related to "verify_parent_transid" messages already discussed on this mailing list. However, there is no actual help yet available to my case.
Disks /dev/sda1 and /dev/sdb1 as /boot, 100Mb, ext3, manually mirrored /dev/sda6 and /dev/sda6 as /, 50Gb, btrfs raid1 /dev/sda7 and /dev/sdb7 as /mnt/share, 543Gb, btrfs raid1 Boot fails and starts to loop with errors "parent transid verify failed on". However, I was able to boot from usb stick and mount the partitions with "mount UUID=... <mount point> -o degraded". After unmounting the UUID identified partitions I was also able to mount them without the "-o degraded". Also btrfs-show shows raid devices as _not_degraded_. The initrd+vmlinuz in use have been able to boot the / and /mnt/share before but one boot caused by power failure corrupted something. I also can mount /dev/sd[ab][67] directly but I tried to use "btrfs-vol -r /dev/sd[ab][67]" with various combinations without any luck. btrfsck /dev/sda6 or /dev/sdb6 gives leaf parent key incorrect <number> bad block <number> btrfsck /dev/sda7 or /dev/sdb7 gives no errors. Any help on how to fix this boot appreciated. Especially * How can I be sure that raid1 mirror is ok? * Is there a way to fix any fs errors? Btrfsck does not fix just reports? And yes, I know btrfs is experimental but I decided to try it anyway. It worked nicely for a week and only two problems are this recovery from failures and hacking mkinitrd to run "btrfs device scan" which enables boot from btrfs raid1 root partition. Jari -- *** Jari Seppälä -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
