Hello, all after sudden I can't mount my btrfs home partition anymore. System is Arch with kernel 3.17.2, but I use snapper which does snapshopts regularly and I had 3.17.1 before, which afaik had some problems with snapshops. Trying to mount without any options gives to the syslog: Nov 02 16:04:16 horus kernel: BTRFS: mismatching generation and generation_v2 found in root item. This root was probably mounted with an older kernel. Resetting all new fields. Nov 02 16:04:16 horus kernel: parent transid verify failed on 2121534193664 wanted 1073784832 found 45541 Nov 02 16:04:16 horus kernel: parent transid verify failed on 2121534193664 wanted 1073784832 found 45541 Nov 02 16:04:16 horus kernel: BTRFS: open_ctree failed btrfsck quits after about half a minute with # btrfsck /dev/sdb1 root item for root 3377, current bytenr 2122078191616, current gen 8589934592, current level 64, new bytenr 2122078191616, new gen 49443, new level 1 root 3377 has a root item with a more recent gen (8589934592) compared to the found root node (49443) I also tried -s 0 or -s 1 or -b options to btrfsck, as well as # btrfsck --init-extent-tree /dev/sdb1 root 3377 has a root item with a more recent gen (8589934592) compared to the found root node (49443) # btrfsck --init-csum-tree /dev/sdb1 Creating a new CRC tree root 3377 has a root item with a more recent gen (8589934592) compared to the found root node (49443) Mounting with -o recovery gives exact the same error. My usual mount options were defaults,compress=lzo,subvol=__current. I also tried btrfs-zero-log but this does not change anything either. Any ideas are deeply appreciated! Please help! Florian -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html