Hi,
I've got a big BTRFS raid10 set that fails to mount. I'm currently
running "btrfs restore" on the most important stuff, but would
appreciate any ideas on how to fix the FS gracefully.
# btrfs de scan
# mount -o clear_cache,recovery,degraded /dev/sdh1 /mnt/raid/
mount: /dev/sdh1: can't read superblock
The FS consists of 8 disks:
# btrfs fi show
Label: 'btrfs-raid' uuid: 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc
Total devices 8 FS bytes used 9.26TiB
devid 4 size 2.73TiB used 2.34TiB path /dev/sdi1
devid 5 size 2.73TiB used 2.34TiB path /dev/sdj1
devid 7 size 2.73TiB used 2.34TiB path /dev/sdc1
devid 9 size 3.64TiB used 2.34TiB path /dev/sdh1
devid 11 size 2.73TiB used 2.34TiB path /dev/sda1
devid 16 size 2.73TiB used 2.34TiB path /dev/sdk1
devid 17 size 2.73TiB used 2.34TiB path /dev/sdl1
devid 18 size 3.64TiB used 2.34TiB path /dev/sdd1
Software versions are pretty recent:
# uname -a
Linux serv-archive 4.4.0-1-amd64 #1 SMP Debian 4.4.6-1 (2016-03-17)
x86_64 GNU/Linux
# btrfs version
btrfs-progs v4.4
Errors don't *look* that bad...
# btrfsck -p /dev/sda1
Checking filesystem on /dev/sda1
UUID: 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc
bad key ordering 173 174
bad block 103797139668992
Errors found in extent allocation tree or chunk allocation
block group 98636232261632 has wrong amount of free space
failed to load free space cache for block group 98636232261632
checking free space cache [o]
checking fs roots [.]
(...havent's seen this through, takes forever)
# btrfsck -s 2 -p /dev/sda1
using SB copy 2, bytenr 274877906944
Checking filesystem on /dev/sda1
UUID: 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc
bad key ordering 173 174
bad block 103797139668992
Errors found in extent allocation tree or chunk allocation
block group 98636232261632 has wrong amount of free space
failed to load free space cache for block group 98636232261632
checking free space cache [o]
checking fs roots [o]
...but mount attempts show "corrupt leaf, bad key" and end in "BTRFS:
open_ctree failed":
# dmesg
...
[ 13.156643] Btrfs loaded
[ 13.228545] BTRFS: device label btrfs-raid devid 17 transid
15891267 /dev/sdl1
[ 13.228606] BTRFS: device label btrfs-raid devid 16 transid
15891267 /dev/sdk1
[ 13.228666] BTRFS: device label btrfs-raid devid 5 transid 15891267 /dev/sdj1
[ 13.228723] BTRFS: device label btrfs-raid devid 4 transid 15891267 /dev/sdi1
[ 13.228799] BTRFS: device label btrfs-raid devid 9 transid 15891267 /dev/sdh1
[ 13.228858] BTRFS: device label btrfs-raid devid 18 transid
15891267 /dev/sdd1
[ 13.228920] BTRFS: device label btrfs-raid devid 7 transid 15891267 /dev/sdc1
[ 13.228977] BTRFS: device label btrfs-raid devid 11 transid
15891267 /dev/sda1
...
[ 191.183172] BTRFS info (device sda1): force clearing of disk cache
[ 191.183181] BTRFS info (device sda1): enabling auto recovery
[ 191.183184] BTRFS info (device sda1): allowing degraded mounts
[ 191.183188] BTRFS info (device sda1): disk space caching is enabled
[ 192.057675] BTRFS info (device sda1): bdev /dev/sdi1 errs: wr 0, rd
0, flush 0, corrupt 10, gen 0
[ 192.057678] BTRFS info (device sda1): bdev /dev/sdj1 errs: wr 0, rd
7, flush 0, corrupt 20, gen 0
[ 210.226357] BTRFS critical (device sda1): corrupt leaf, bad key
order: block=103797139668992,root=1, slot=173
[ 210.226535] BTRFS critical (device sda1): corrupt leaf, bad key
order: block=103797139668992,root=1, slot=173
[ 210.236768] BTRFS critical (device sda1): corrupt leaf, bad key
order: block=103797139668992,root=1, slot=173
[ 210.263439] BTRFS critical (device sda1): corrupt leaf, bad key
order: block=103797139668992,root=1, slot=173
[ 210.263447] ------------[ cut here ]------------
[ 210.263464] WARNING: CPU: 1 PID: 118 at
/build/linux-dFNWCu/linux-4.4.6/fs/btrfs/extent-tree.c:6552
__btrfs_free_extent.isra.70+0x314/0xd70 [btrfs]()
[ 210.263465] BTRFS: Transaction aborted (error -5)
[ 210.263466] Modules linked in: nfsd auth_rpcgss oid_registry
nfs_acl nfs lockd grace fscache sunrpc intel_rapl iosf_mbi
x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass
crct10dif_pclmul crc32_pclmul iTCO_wdt iTCO_vendor_support eeepc_wmi
asus_wmi sparse_keymap rfkill sha256_ssse3 sha256_generic hmac drbg
ansi_cprng aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper
cryptd psmouse pcspkr nouveau serio_raw i2c_i801 mxm_wmi lpc_ich ttm
mfd_core drm_kms_helper drm option huawei_cdc_ncm cdc_wdm usb_wwan
cdc_ncm usbnet joydev evdev mei_me mii usbserial shpchp mei
8250_fintek battery wmi video tpm_infineon button tpm_tis tpm
processor coretemp loop autofs4 ext4 crc16 mbcache jbd2 btrfs xor
raid6_pq dm_mod osst st ch sr_mod cdrom hid_generic usbhid hid sg
sd_mod uas usb_storage crc32c_intel
[ 210.263497] ahci libahci firewire_ohci mpt3sas raid_class
scsi_transport_sas igb i2c_algo_bit dca ptp ehci_pci pps_core ehci_hcd
firewire_core xhci_pci crc_itu_t libata xhci_hcd scsi_mod usbcore
usb_common fjes fan thermal
[ 210.263506] CPU: 1 PID: 118 Comm: kworker/u8:4 Not tainted
4.4.0-1-amd64 #1 Debian 4.4.6-1
[ 210.263507] Hardware name: ASUS All Series/Z87-WS, BIOS 2004 06/05/2014
[ 210.263517] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[ 210.263518] 0000000000000286 00000000812d62de ffffffff812ea865
ffff880408987b20
[ 210.263519] ffffffffa03dd468 ffffffff810774fd 000059b651a58000
ffff880408987b78
[ 210.263521] 0000000000000000 ffff88040aa87000 ffff880408d6a000
ffffffff8107758c
[ 210.263522] Call Trace:
[ 210.263526] [<ffffffff812ea865>] ? dump_stack+0x5c/0x77
[ 210.263528] [<ffffffff810774fd>] ? warn_slowpath_common+0x7d/0xb0
[ 210.263529] [<ffffffff8107758c>] ? warn_slowpath_fmt+0x5c/0x80
[ 210.263536] [<ffffffffa03408d4>] ?
__btrfs_free_extent.isra.70+0x314/0xd70 [btrfs]
[ 210.263543] [<ffffffffa0344761>] ?
__btrfs_run_delayed_refs+0x4c1/0x11c0 [btrfs]
[ 210.263551] [<ffffffffa0348198>] ? btrfs_run_delayed_refs+0x78/0x2a0 [btrfs]
[ 210.263557] [<ffffffffa03483f2>] ? delayed_ref_async_start+0x32/0x80 [btrfs]
[ 210.263566] [<ffffffffa038e058>] ?
btrfs_scrubparity_helper+0xc8/0x2d0 [btrfs]
[ 210.263568] [<ffffffff8108ed47>] ? process_one_work+0x157/0x410
[ 210.263569] [<ffffffff8108f04d>] ? worker_thread+0x4d/0x450
[ 210.263570] [<ffffffff8108f000>] ? process_one_work+0x410/0x410
[ 210.263572] [<ffffffff81094ddd>] ? kthread+0xcd/0xf0
[ 210.263574] [<ffffffff81094d10>] ? kthread_create_on_node+0x190/0x190
[ 210.263576] [<ffffffff8158efcf>] ? ret_from_fork+0x3f/0x70
[ 210.263578] [<ffffffff81094d10>] ? kthread_create_on_node+0x190/0x190
[ 210.263579] ---[ end trace 089d9efc392111fa ]---
[ 210.263580] BTRFS: error (device sda1) in __btrfs_free_extent:6552:
errno=-5 IO failure
[ 210.263585] BTRFS: error (device sda1) in
btrfs_run_delayed_refs:2927: errno=-5 IO failure
[ 210.263639] BTRFS: error (device sda1) in btrfs_replay_log:2401:
errno=-5 IO failure (Failed to recover log tree)
[ 210.263760] pending csums is 458752
[ 210.263825] BTRFS error (device sda1): cleaner transaction attach
returned -30
[ 245.519916] BTRFS critical (device sda1): corrupt leaf, bad key
order: block=103797139668992,root=1, slot=173
[ 245.519951] ------------[ cut here ]------------
[ 245.519979] WARNING: CPU: 0 PID: 3127 at
/build/linux-dFNWCu/linux-4.4.6/fs/btrfs/extent-tree.c:136
btrfs_put_block_group+0x5a/0x60 [btrfs]()
[ 245.519980] Modules linked in: nfsd auth_rpcgss oid_registry
nfs_acl nfs lockd grace fscache sunrpc intel_rapl iosf_mbi
x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass
crct10dif_pclmul crc32_pclmul iTCO_wdt iTCO_vendor_support eeepc_wmi
asus_wmi sparse_keymap rfkill sha256_ssse3 sha256_generic hmac drbg
ansi_cprng aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper
cryptd psmouse pcspkr nouveau serio_raw i2c_i801 mxm_wmi lpc_ich ttm
mfd_core drm_kms_helper drm option huawei_cdc_ncm cdc_wdm usb_wwan
cdc_ncm usbnet joydev evdev mei_me mii usbserial shpchp mei
8250_fintek battery wmi video tpm_infineon button tpm_tis tpm
processor coretemp loop autofs4 ext4 crc16 mbcache jbd2 btrfs xor
raid6_pq dm_mod osst st ch sr_mod cdrom hid_generic usbhid hid sg
sd_mod uas usb_storage crc32c_intel
[ 245.520010] ahci libahci firewire_ohci mpt3sas raid_class
scsi_transport_sas igb i2c_algo_bit dca ptp ehci_pci pps_core ehci_hcd
firewire_core xhci_pci crc_itu_t libata xhci_hcd scsi_mod usbcore
usb_common fjes fan thermal
[ 245.520019] CPU: 0 PID: 3127 Comm: mount Tainted: G W
4.4.0-1-amd64 #1 Debian 4.4.6-1
[ 245.520020] Hardware name: ASUS All Series/Z87-WS, BIOS 2004 06/05/2014
[ 245.520020] 0000000000000286 0000000062978552 ffffffff812ea865
0000000000000000
[ 245.520022] ffffffffa03dd468 ffffffff810774fd ffff8803f89fb200
ffff8803f89fb200
[ 245.520023] ffff880408d6a080 ffff880408d6a000 ffff880408d6a090
ffffffffa033fd2a
[ 245.520025] Call Trace:
[ 245.520029] [<ffffffff812ea865>] ? dump_stack+0x5c/0x77
[ 245.520032] [<ffffffff810774fd>] ? warn_slowpath_common+0x7d/0xb0
[ 245.520039] [<ffffffffa033fd2a>] ? btrfs_put_block_group+0x5a/0x60 [btrfs]
[ 245.520046] [<ffffffffa0347546>] ?
btrfs_free_block_groups+0xd6/0x3d0 [btrfs]
[ 245.520054] [<ffffffffa035a517>] ? open_ctree+0x1b07/0x2470 [btrfs]
[ 245.520061] [<ffffffffa032f69c>] ? btrfs_mount+0x8ec/0xa00 [btrfs]
[ 245.520063] [<ffffffff8118897b>] ? pcpu_next_unpop+0x3b/0x50
[ 245.520065] [<ffffffff811dafe6>] ? mount_fs+0x36/0x160
[ 245.520066] [<ffffffff811f5e42>] ? vfs_kern_mount+0x62/0x100
[ 245.520072] [<ffffffffa032ef6b>] ? btrfs_mount+0x1bb/0xa00 [btrfs]
[ 245.520074] [<ffffffff8118897b>] ? pcpu_next_unpop+0x3b/0x50
[ 245.520075] [<ffffffff81189902>] ? pcpu_alloc+0x392/0x6a0
[ 245.520077] [<ffffffff811dafe6>] ? mount_fs+0x36/0x160
[ 245.520078] [<ffffffff811f5e42>] ? vfs_kern_mount+0x62/0x100
[ 245.520079] [<ffffffff811f834c>] ? do_mount+0x22c/0xd40
[ 245.520081] [<ffffffff811f918a>] ? SyS_mount+0x9a/0xf0
[ 245.520083] [<ffffffff8158ec32>] ? system_call_fast_compare_end+0xc/0x67
[ 245.520084] ---[ end trace 089d9efc392111fb ]---
[ 245.555010] BTRFS: open_ctree failed
========================================================================
========================================================================
# btrfs-show-super /dev/sda1 -f -a
---------------------------------------------------------
csum 0xad9f65db [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc
label btrfs-raid
generation 15891267
root 103797496037376
sys_array_size 321
chunk_root_generation 15890014
root_level 1
chunk_root 98481546395648
chunk_root_level 1
log_root 103797444984832
log_root_transid 0
log_root_level 0
total_bytes 26005118910464
bytes_used 10185173540864
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 8
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x69
( MIXED_BACKREF |
COMPRESS_LZO |
BIG_METADATA |
EXTENDED_IREF )
csum_type 0
csum_size 4
cache_generation 15891267
uuid_tree_generation 15891267
dev_item.uuid df4c61f5-1e77-4e03-8d4a-6301a04d0b3c
dev_item.fsid 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc [match]
dev_item.type 0
dev_item.total_bytes 3000591450112
dev_item.bytes_used 2569480962048
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 11
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 98481546330112)
chunk length 67108864 owner 2 stripe_len 65536
type SYSTEM|RAID10 num_stripes 8
stripe 0 devid 18 offset 1025424490496
dev uuid: fca3ed49-de9a-4525-8848-7b9c494045bd
stripe 1 devid 17 offset 1025424490496
dev uuid: 552340b0-4218-4197-848f-f631acc658f2
stripe 2 devid 16 offset 426108780544
dev uuid: 96025eea-b4fe-4ae8-9d08-9f8a1fdbb784
stripe 3 devid 9 offset 205119291392
dev uuid: 191414fb-6c9c-45bb-8490-87d4317fb0db
stripe 4 devid 7 offset 181463416832
dev uuid: 9143bdf3-ec10-4048-8c14-2f9e51dfa2dd
stripe 5 devid 4 offset 6443499520
dev uuid: 6c68d643-4a49-48ba-8d1a-e320bd290af3
stripe 6 devid 11 offset 20435697664
dev uuid: df4c61f5-1e77-4e03-8d4a-6301a04d0b3c
stripe 7 devid 5 offset 5369757696
dev uuid: 23438b70-6c1d-4f9a-8703-c5d00038d55f
backup_roots[4]:
backup 0:
backup_tree_root: 103797424144384 gen: 15891265 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797407514624 gen: 15891265 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797398618112 gen: 15891265 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185172480000
backup_num_devices: 8
backup 1:
backup_tree_root: 103797398749184 gen: 15891266 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797452177408 gen: 15891267 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797411266560 gen: 15891267 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185173540864
backup_num_devices: 8
backup 2:
backup_tree_root: 103797496037376 gen: 15891267 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797430976512 gen: 15891268 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797424144384 gen: 15891268 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185173442560
backup_num_devices: 8
backup 3:
backup_tree_root: 103797410758656 gen: 15891264 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797409267712 gen: 15891264 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797401976832 gen: 15891264 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10184586289152
backup_num_devices: 8
superblock: bytenr=67108864, device=/dev/sda1
---------------------------------------------------------
csum 0x67cb727e [match]
bytenr 67108864
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc
label btrfs-raid
generation 15891267
root 103797496037376
sys_array_size 321
chunk_root_generation 15890014
root_level 1
chunk_root 98481546395648
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 26005118910464
bytes_used 10185173540864
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 8
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x69
( MIXED_BACKREF |
COMPRESS_LZO |
BIG_METADATA |
EXTENDED_IREF )
csum_type 0
csum_size 4
cache_generation 15891267
uuid_tree_generation 15891267
dev_item.uuid df4c61f5-1e77-4e03-8d4a-6301a04d0b3c
dev_item.fsid 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc [match]
dev_item.type 0
dev_item.total_bytes 3000591450112
dev_item.bytes_used 2569480962048
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 11
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 98481546330112)
chunk length 67108864 owner 2 stripe_len 65536
type SYSTEM|RAID10 num_stripes 8
stripe 0 devid 18 offset 1025424490496
dev uuid: fca3ed49-de9a-4525-8848-7b9c494045bd
stripe 1 devid 17 offset 1025424490496
dev uuid: 552340b0-4218-4197-848f-f631acc658f2
stripe 2 devid 16 offset 426108780544
dev uuid: 96025eea-b4fe-4ae8-9d08-9f8a1fdbb784
stripe 3 devid 9 offset 205119291392
dev uuid: 191414fb-6c9c-45bb-8490-87d4317fb0db
stripe 4 devid 7 offset 181463416832
dev uuid: 9143bdf3-ec10-4048-8c14-2f9e51dfa2dd
stripe 5 devid 4 offset 6443499520
dev uuid: 6c68d643-4a49-48ba-8d1a-e320bd290af3
stripe 6 devid 11 offset 20435697664
dev uuid: df4c61f5-1e77-4e03-8d4a-6301a04d0b3c
stripe 7 devid 5 offset 5369757696
dev uuid: 23438b70-6c1d-4f9a-8703-c5d00038d55f
backup_roots[4]:
backup 0:
backup_tree_root: 103797424144384 gen: 15891265 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797407514624 gen: 15891265 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797398618112 gen: 15891265 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185172480000
backup_num_devices: 8
backup 1:
backup_tree_root: 103797398749184 gen: 15891266 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797452177408 gen: 15891267 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797411266560 gen: 15891267 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185173540864
backup_num_devices: 8
backup 2:
backup_tree_root: 103797496037376 gen: 15891267 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797452177408 gen: 15891267 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797411266560 gen: 15891267 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185173540864
backup_num_devices: 8
backup 3:
backup_tree_root: 103797410758656 gen: 15891264 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797409267712 gen: 15891264 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797401976832 gen: 15891264 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10184586289152
backup_num_devices: 8
superblock: bytenr=274877906944, device=/dev/sda1
---------------------------------------------------------
csum 0x9a4c244f [match]
bytenr 274877906944
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc
label btrfs-raid
generation 15891267
root 103797496037376
sys_array_size 321
chunk_root_generation 15890014
root_level 1
chunk_root 98481546395648
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 26005118910464
bytes_used 10185173540864
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 8
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x69
( MIXED_BACKREF |
COMPRESS_LZO |
BIG_METADATA |
EXTENDED_IREF )
csum_type 0
csum_size 4
cache_generation 15891267
uuid_tree_generation 15891267
dev_item.uuid df4c61f5-1e77-4e03-8d4a-6301a04d0b3c
dev_item.fsid 8b5b4aa6-c3c6-4db0-9ead-df93812e51bc [match]
dev_item.type 0
dev_item.total_bytes 3000591450112
dev_item.bytes_used 2569480962048
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 11
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 98481546330112)
chunk length 67108864 owner 2 stripe_len 65536
type SYSTEM|RAID10 num_stripes 8
stripe 0 devid 18 offset 1025424490496
dev uuid: fca3ed49-de9a-4525-8848-7b9c494045bd
stripe 1 devid 17 offset 1025424490496
dev uuid: 552340b0-4218-4197-848f-f631acc658f2
stripe 2 devid 16 offset 426108780544
dev uuid: 96025eea-b4fe-4ae8-9d08-9f8a1fdbb784
stripe 3 devid 9 offset 205119291392
dev uuid: 191414fb-6c9c-45bb-8490-87d4317fb0db
stripe 4 devid 7 offset 181463416832
dev uuid: 9143bdf3-ec10-4048-8c14-2f9e51dfa2dd
stripe 5 devid 4 offset 6443499520
dev uuid: 6c68d643-4a49-48ba-8d1a-e320bd290af3
stripe 6 devid 11 offset 20435697664
dev uuid: df4c61f5-1e77-4e03-8d4a-6301a04d0b3c
stripe 7 devid 5 offset 5369757696
dev uuid: 23438b70-6c1d-4f9a-8703-c5d00038d55f
backup_roots[4]:
backup 0:
backup_tree_root: 103797424144384 gen: 15891265 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797407514624 gen: 15891265 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797398618112 gen: 15891265 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185172480000
backup_num_devices: 8
backup 1:
backup_tree_root: 103797398749184 gen: 15891266 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797452177408 gen: 15891267 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797411266560 gen: 15891267 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185173540864
backup_num_devices: 8
backup 2:
backup_tree_root: 103797496037376 gen: 15891267 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797452177408 gen: 15891267 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797411266560 gen: 15891267 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10185173540864
backup_num_devices: 8
backup 3:
backup_tree_root: 103797410758656 gen: 15891264 level: 1
backup_chunk_root: 98481546395648 gen: 15890014 level: 1
backup_extent_root: 103797409267712 gen: 15891264 level: 2
backup_fs_root: 102098872401920 gen: 15872333 level: 0
backup_dev_root: 103797478162432 gen: 15890014 level: 1
backup_csum_root: 103797401976832 gen: 15891264 level: 3
backup_total_bytes: 26005118910464
backup_bytes_used: 10184586289152
backup_num_devices: 8
--
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