Hi Chris, Thanks for replying. On Fri, 29 Mar 2019 at 13:27, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: ... > Seem in conflict. I don't really understand how the kernel complains > about a bad super and yet user space tools say they're all OK. What > happens if you try: > > # mount -o ro,nologreplay,usebackuproot I got essentially the same results... % mount -o ro,nologreplay,usebackuproot /dev/sda1 mount: /data: can't read superblock on /dev/sda1. and from dmesg... [73194.642197] BTRFS info (device sda1): use lzo compression, level 0 [73194.642206] BTRFS info (device sda1): disabling log replay at mount time [73194.642210] BTRFS info (device sda1): trying to use backup root at mount time [73194.642211] BTRFS info (device sda1): disk space caching is enabled [73194.642213] BTRFS info (device sda1): has skinny extents [73194.726290] BTRFS info (device sda1): bdev /dev/sda1 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0 [73194.726297] BTRFS info (device sda1): bdev /dev/sdc1 errs: wr 0, rd 0, flush 0, corrupt 4, gen 0 [73194.753315] BTRFS error (device sda1): parent transid verify failed on 628168376320 wanted 37601 found 37712 [73194.779836] BTRFS error (device sda1): parent transid verify failed on 628168376320 wanted 37601 found 37712 > If that doesn't work, including kernel messages again, and also > include output from: > > # btrfs insp dump-s -fa /dev/sda1 > # btrfs insp dump-s -fa /dev/sdb1 I've attached the output from these commands (note that since I added an extra disk, what was sdb1 has now become sdc1). I'll have a go at the newer kernel approach you suggest and see what happens there. Regards, Glenn > > > > and dmesg says: > > > > [15944.017629] BTRFS info (device sda1): disk space caching is enabled > > [15944.017632] BTRFS info (device sda1): has skinny extents > > [15944.024480] BTRFS info (device sda1): bdev /dev/sda1 errs: wr 0, rd > > 0, flush 0, corrupt 1, gen 0 > > [15944.024487] BTRFS info (device sda1): bdev /dev/sdb1 errs: wr 0, rd > > 0, flush 0, corrupt 4, gen 0 > > [15944.029292] BTRFS error (device sda1): parent transid verify failed > > on 628168376320 wanted 37601 found 37700 > > [15944.029466] BTRFS error (device sda1): parent transid verify failed > > on 628168376320 wanted 37601 found 37700 > > That's usually bad. > > > > Other system information is: > > % uname -a > > Linux izen 4.18.0-16-generic #17-Ubuntu SMP Fri Feb 8 00:06:57 UTC > > 2019 x86_64 x86_64 x86_64 GNU/Linux > > It looks like extent tree corruption so I don't think it'll help to > use a newer kernel; but I'd try it anyway in the meantime until a > developer gets around to responding. Distro specific kernels tend to > be supported by that distribution where upstream lists tend to support > mainline. So I suggest 5.0.4, or 4.19.32, or you can be brave and > download this, image it to a USB stick (dd if=file of=/dev/ bs=1M > oflag=direct) which of course will erase everything on the stick. > > https://kojipkgs.fedoraproject.org/compose/rawhide/Fedora-Rawhide-20190327.n.0/compose/Everything/x86_64/iso/Fedora-Everything-netinst-x86_64-Rawhide-20190327.n.0.iso > > That might have 5.1rc2 on it, or something in between rc1 and rc2. > You're still going to try and mount it read-only per above command, so > even if it blows up it's not going to make this worse. > > > > % btrfs check /dev/sda1 > > Checking filesystem on /dev/sda1 > > UUID: d5e50511-3e31-4de6-ba37-c5841895be9f > > checking extents > > parent transid verify failed on 628168343552 wanted 28163 found 37700 > > parent transid verify failed on 628168343552 wanted 28163 found 37700 > > parent transid verify failed on 628168343552 wanted 28163 found 37700 > > parent transid verify failed on 628168343552 wanted 28163 found 37700 > > The transid's are really far apart, definitely something went really > wrong. It could be hardware or both hardware and btrfs bug. That it > affected *both* copies is a little weird unless it's memory corruption > related, and then a lot of things can go wrong. > > > > > > Where do I go from here? > > If it can't be mounted, then the only chance is `btrfs-find-tree` and > `btrfs restore` to try and scrape out whatever data you need that > isn't already backed up. The priority before trying to repair it, is > to get anything important off because trying to repair it has a good > chance of permanent data loss. Definitely the latest tools are > recommended for repair, kernel doesn't matter so much. > > > -- > Chris Murphy
superblock: bytenr=65536, device=/dev/sda1 --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0x68d72f78 [match] bytenr 65536 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid d5e50511-3e31-4de6-ba37-c5841895be9f metadata_uuid d5e50511-3e31-4de6-ba37-c5841895be9f label data generation 37713 root 628168458240 sys_array_size 226 chunk_root_generation 37696 root_level 1 chunk_root 1085582344192 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 4000795660288 bytes_used 891682791424 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 2 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x169 ( MIXED_BACKREF | COMPRESS_LZO | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 37697 uuid_tree_generation 37697 dev_item.uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb dev_item.fsid d5e50511-3e31-4de6-ba37-c5841895be9f [match] dev_item.type 0 dev_item.total_bytes 2000397795328 dev_item.bytes_used 718366834688 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 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1085582344192) length 33554432 owner 2 stripe_len 65536 type SYSTEM|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 1 stripe 0 devid 2 offset 543314411520 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 stripe 1 devid 1 offset 2185232384 dev_uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 1470082580480) length 33554432 owner 2 stripe_len 65536 type SYSTEM io_align 65536 io_width 65536 sector_size 4096 num_stripes 1 sub_stripes 1 stripe 0 devid 2 offset 817219239936 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 backup_roots[4]: backup 0: backup_tree_root: 628642381824 gen: 37697 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628642529280 gen: 37697 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628645314560 gen: 37697 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 1: backup_tree_root: 628628897792 gen: 37694 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628624818176 gen: 37694 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628629946368 gen: 37694 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 2: backup_tree_root: 628633518080 gen: 37695 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628633534464 gen: 37695 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628634140672 gen: 37695 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 3: backup_tree_root: 628632535040 gen: 37696 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628624818176 gen: 37696 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628632649728 gen: 37696 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 superblock: bytenr=67108864, device=/dev/sda1 --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0xc8b607b6 [match] bytenr 67108864 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid d5e50511-3e31-4de6-ba37-c5841895be9f metadata_uuid d5e50511-3e31-4de6-ba37-c5841895be9f label data generation 37713 root 628168458240 sys_array_size 226 chunk_root_generation 37696 root_level 1 chunk_root 1085582344192 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 4000795660288 bytes_used 891682791424 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 2 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x169 ( MIXED_BACKREF | COMPRESS_LZO | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 37697 uuid_tree_generation 37697 dev_item.uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb dev_item.fsid d5e50511-3e31-4de6-ba37-c5841895be9f [match] dev_item.type 0 dev_item.total_bytes 2000397795328 dev_item.bytes_used 718366834688 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 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1085582344192) length 33554432 owner 2 stripe_len 65536 type SYSTEM|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 1 stripe 0 devid 2 offset 543314411520 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 stripe 1 devid 1 offset 2185232384 dev_uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 1470082580480) length 33554432 owner 2 stripe_len 65536 type SYSTEM io_align 65536 io_width 65536 sector_size 4096 num_stripes 1 sub_stripes 1 stripe 0 devid 2 offset 817219239936 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 backup_roots[4]: backup 0: backup_tree_root: 628642381824 gen: 37697 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628642529280 gen: 37697 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628645314560 gen: 37697 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 1: backup_tree_root: 628628897792 gen: 37694 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628624818176 gen: 37694 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628629946368 gen: 37694 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 2: backup_tree_root: 628633518080 gen: 37695 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628633534464 gen: 37695 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628634140672 gen: 37695 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 3: backup_tree_root: 628632535040 gen: 37696 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628624818176 gen: 37696 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628632649728 gen: 37696 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 superblock: bytenr=274877906944, device=/dev/sda1 --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0x35315187 [match] bytenr 274877906944 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid d5e50511-3e31-4de6-ba37-c5841895be9f metadata_uuid d5e50511-3e31-4de6-ba37-c5841895be9f label data generation 37713 root 628168458240 sys_array_size 226 chunk_root_generation 37696 root_level 1 chunk_root 1085582344192 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 4000795660288 bytes_used 891682791424 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 2 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x169 ( MIXED_BACKREF | COMPRESS_LZO | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 37697 uuid_tree_generation 37697 dev_item.uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb dev_item.fsid d5e50511-3e31-4de6-ba37-c5841895be9f [match] dev_item.type 0 dev_item.total_bytes 2000397795328 dev_item.bytes_used 718366834688 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 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1085582344192) length 33554432 owner 2 stripe_len 65536 type SYSTEM|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 1 stripe 0 devid 2 offset 543314411520 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 stripe 1 devid 1 offset 2185232384 dev_uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 1470082580480) length 33554432 owner 2 stripe_len 65536 type SYSTEM io_align 65536 io_width 65536 sector_size 4096 num_stripes 1 sub_stripes 1 stripe 0 devid 2 offset 817219239936 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 backup_roots[4]: backup 0: backup_tree_root: 628642381824 gen: 37697 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628642529280 gen: 37697 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628645314560 gen: 37697 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 1: backup_tree_root: 628628897792 gen: 37694 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628624818176 gen: 37694 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628629946368 gen: 37694 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 2: backup_tree_root: 628633518080 gen: 37695 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628633534464 gen: 37695 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628634140672 gen: 37695 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 3: backup_tree_root: 628632535040 gen: 37696 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628624818176 gen: 37696 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628632649728 gen: 37696 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2
superblock: bytenr=65536, device=/dev/sdc1 --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0xbc7e4798 [match] bytenr 65536 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid d5e50511-3e31-4de6-ba37-c5841895be9f metadata_uuid d5e50511-3e31-4de6-ba37-c5841895be9f label data generation 37713 root 628168458240 sys_array_size 226 chunk_root_generation 37696 root_level 1 chunk_root 1085582344192 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 4000795660288 bytes_used 891682791424 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 2 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x169 ( MIXED_BACKREF | COMPRESS_LZO | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 37697 uuid_tree_generation 37697 dev_item.uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 dev_item.fsid d5e50511-3e31-4de6-ba37-c5841895be9f [match] dev_item.type 0 dev_item.total_bytes 2000397864960 dev_item.bytes_used 877314179072 dev_item.io_align 4096 dev_item.io_width 4096 dev_item.sector_size 4096 dev_item.devid 2 dev_item.dev_group 0 dev_item.seek_speed 0 dev_item.bandwidth 0 dev_item.generation 0 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1085582344192) length 33554432 owner 2 stripe_len 65536 type SYSTEM|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 1 stripe 0 devid 2 offset 543314411520 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 stripe 1 devid 1 offset 2185232384 dev_uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 1470082580480) length 33554432 owner 2 stripe_len 65536 type SYSTEM io_align 65536 io_width 65536 sector_size 4096 num_stripes 1 sub_stripes 1 stripe 0 devid 2 offset 817219239936 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 backup_roots[4]: backup 0: backup_tree_root: 628642381824 gen: 37697 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628642529280 gen: 37697 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628645314560 gen: 37697 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 1: backup_tree_root: 628628897792 gen: 37694 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628624818176 gen: 37694 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628629946368 gen: 37694 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 2: backup_tree_root: 628633518080 gen: 37695 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628633534464 gen: 37695 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628634140672 gen: 37695 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 3: backup_tree_root: 628632535040 gen: 37696 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628624818176 gen: 37696 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628632649728 gen: 37696 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 superblock: bytenr=67108864, device=/dev/sdc1 --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0x1c1f6f56 [match] bytenr 67108864 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid d5e50511-3e31-4de6-ba37-c5841895be9f metadata_uuid d5e50511-3e31-4de6-ba37-c5841895be9f label data generation 37713 root 628168458240 sys_array_size 226 chunk_root_generation 37696 root_level 1 chunk_root 1085582344192 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 4000795660288 bytes_used 891682791424 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 2 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x169 ( MIXED_BACKREF | COMPRESS_LZO | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 37697 uuid_tree_generation 37697 dev_item.uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 dev_item.fsid d5e50511-3e31-4de6-ba37-c5841895be9f [match] dev_item.type 0 dev_item.total_bytes 2000397864960 dev_item.bytes_used 877314179072 dev_item.io_align 4096 dev_item.io_width 4096 dev_item.sector_size 4096 dev_item.devid 2 dev_item.dev_group 0 dev_item.seek_speed 0 dev_item.bandwidth 0 dev_item.generation 0 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1085582344192) length 33554432 owner 2 stripe_len 65536 type SYSTEM|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 1 stripe 0 devid 2 offset 543314411520 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 stripe 1 devid 1 offset 2185232384 dev_uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 1470082580480) length 33554432 owner 2 stripe_len 65536 type SYSTEM io_align 65536 io_width 65536 sector_size 4096 num_stripes 1 sub_stripes 1 stripe 0 devid 2 offset 817219239936 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 backup_roots[4]: backup 0: backup_tree_root: 628642381824 gen: 37697 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628642529280 gen: 37697 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628645314560 gen: 37697 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 1: backup_tree_root: 628628897792 gen: 37694 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628624818176 gen: 37694 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628629946368 gen: 37694 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 2: backup_tree_root: 628633518080 gen: 37695 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628633534464 gen: 37695 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628634140672 gen: 37695 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 3: backup_tree_root: 628632535040 gen: 37696 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628624818176 gen: 37696 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628632649728 gen: 37696 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 superblock: bytenr=274877906944, device=/dev/sdc1 --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0xe1983967 [match] bytenr 274877906944 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid d5e50511-3e31-4de6-ba37-c5841895be9f metadata_uuid d5e50511-3e31-4de6-ba37-c5841895be9f label data generation 37713 root 628168458240 sys_array_size 226 chunk_root_generation 37696 root_level 1 chunk_root 1085582344192 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 4000795660288 bytes_used 891682791424 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 2 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x169 ( MIXED_BACKREF | COMPRESS_LZO | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 37697 uuid_tree_generation 37697 dev_item.uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 dev_item.fsid d5e50511-3e31-4de6-ba37-c5841895be9f [match] dev_item.type 0 dev_item.total_bytes 2000397864960 dev_item.bytes_used 877314179072 dev_item.io_align 4096 dev_item.io_width 4096 dev_item.sector_size 4096 dev_item.devid 2 dev_item.dev_group 0 dev_item.seek_speed 0 dev_item.bandwidth 0 dev_item.generation 0 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1085582344192) length 33554432 owner 2 stripe_len 65536 type SYSTEM|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 1 stripe 0 devid 2 offset 543314411520 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 stripe 1 devid 1 offset 2185232384 dev_uuid a28b0f34-f14d-492b-995b-2dd8a78ec9bb item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 1470082580480) length 33554432 owner 2 stripe_len 65536 type SYSTEM io_align 65536 io_width 65536 sector_size 4096 num_stripes 1 sub_stripes 1 stripe 0 devid 2 offset 817219239936 dev_uuid d9c56d7a-21a1-4197-a701-5493392e1ae1 backup_roots[4]: backup 0: backup_tree_root: 628642381824 gen: 37697 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628642529280 gen: 37697 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628645314560 gen: 37697 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 1: backup_tree_root: 628628897792 gen: 37694 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628624818176 gen: 37694 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628629946368 gen: 37694 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 2: backup_tree_root: 628633518080 gen: 37695 level: 1 backup_chunk_root: 1085582409728 gen: 37616 level: 1 backup_extent_root: 628633534464 gen: 37695 level: 2 backup_fs_root: 628623933440 gen: 37694 level: 2 backup_dev_root: 628452327424 gen: 37616 level: 1 backup_csum_root: 628634140672 gen: 37695 level: 2 backup_total_bytes: 4000795663872 backup_bytes_used: 891681054720 backup_num_devices: 2 backup 3: backup_tree_root: 628632535040 gen: 37696 level: 1 backup_chunk_root: 1085582344192 gen: 37696 level: 1 backup_extent_root: 628624818176 gen: 37696 level: 2 backup_fs_root: 628635549696 gen: 37696 level: 2 backup_dev_root: 628642152448 gen: 37696 level: 1 backup_csum_root: 628632649728 gen: 37696 level: 2 backup_total_bytes: 4000795660288 backup_bytes_used: 891681054720 backup_num_devices: 2
