On Sat, Mar 26, 2016 at 7:50 PM, Kai Krakow <hurikha...@gmail.com> wrote:
> > # now let's wait for the backup to mount the FS and look at dmesg: > > [21375.606479] BTRFS info (device sde1): force zlib compression > [21375.606483] BTRFS info (device sde1): using free space tree You're using space_cache=v2. You're aware new free space tree option sets a read only incompat feature flag on the file system? You've got quite a few non-default mount options on this backup volume. Hopefully Qu has some idea what to try next or if you're better off just starting over with a new file system. > I only saw unreliable behavior with 4.4.5, 4.4.6, and 4.5.0 tho the > problem may exist longer in my FS. > > $ sudo btrfs-show-super /dev/sde1 > superblock: bytenr=65536, device=/dev/sde1 > --------------------------------------------------------- > csum 0xcc976d97 [match] > bytenr 65536 > flags 0x1 > ( WRITTEN ) > magic _BHRfS_M [match] > fsid 1318ec21-c421-4e36-a44a-7be3d41f9c3f > label usb-backup > generation 50814 > root 1251250159616 > sys_array_size 129 > chunk_root_generation 50784 > root_level 1 > chunk_root 2516518567936 > chunk_root_level 1 > log_root 0 > log_root_transid 0 > log_root_level 0 > total_bytes 2000397864960 > bytes_used 1860398493696 > sectorsize 4096 > nodesize 16384 > leafsize 16384 > stripesize 4096 > root_dir 6 > num_devices 1 > compat_flags 0x0 > compat_ro_flags 0x1 > incompat_flags 0x169 > ( MIXED_BACKREF | > COMPRESS_LZO | > BIG_METADATA | > EXTENDED_IREF | > SKINNY_METADATA ) > csum_type 0 > csum_size 4 > cache_generation 50208 > uuid_tree_generation 50742 > dev_item.uuid 9008d5a0-ac7b-4505-8193-27428429f953 > dev_item.fsid 1318ec21-c421-4e36-a44a-7be3d41f9c3f [match] > dev_item.type 0 > dev_item.total_bytes 2000397864960 > dev_item.bytes_used 1912308039680 > dev_item.io_align 4096 > dev_item.io_width 4096 > dev_item.sector_size 4096 > dev_item.devid 1 > dev_item.dev_group 0 > dev_item.seek_speed 0 > dev_item.bandwidth 0 > dev_item.generation 0 > > > > BTW: btrfsck thinks that the space tree is invalid every time it is > run, no matter if cleanly unmounted, uncleanly unmounted, or "btrfsck > --repair" and then ran a second time. -- Chris Murphy -- 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
