> What do you get for
>
> btrfs insp dump-s -f /dev/nvme0n1p3
> btfs insp dump-t -d /dev/nvme0n1p3
$> btrfs insp dump-s -f /dev/nvme0n1p3
superblock: bytenr=65536, device=/dev/nvme0n1p3
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0x043ea018 [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 90e9d74c-3606-4028-9e72-c10e76f44a7c
metadata_uuid 90e9d74c-3606-4028-9e72-c10e76f44a7c
label data
generation 49
root 8612052992
sys_array_size 97
chunk_root_generation 46
root_level 1
chunk_root 1048576
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 188743680000
bytes_used 182011633664
sectorsize 4096
nodesize 16384
leafsize (deprecated) 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x161
( MIXED_BACKREF |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
cache_generation 48
uuid_tree_generation 48
dev_item.uuid e2815a2c-6ec8-45c6-baae-7f429a5f0f78
dev_item.fsid 90e9d74c-3606-4028-9e72-c10e76f44a7c [match]
dev_item.type 0
dev_item.total_bytes 188743680000
dev_item.bytes_used 184704565248
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 1048576)
length 4194304 owner 2 stripe_len 65536 type SYSTEM
io_align 4096 io_width 4096 sector_size 4096
num_stripes 1 sub_stripes 0
stripe 0 devid 1 offset 1048576
dev_uuid e2815a2c-6ec8-45c6-baae-7f429a5f0f78
backup_roots[4]:
backup 0:
backup_tree_root: 8612052992 gen: 49 level: 1
backup_chunk_root: 1048576 gen: 46 level: 1
backup_extent_root: 8612069376 gen: 49 level: 1
backup_fs_root: 8852570112 gen: 47 level: 2
backup_dev_root: 8843755520 gen: 46 level: 0
backup_csum_root: 8853471232 gen: 48 level: 2
backup_total_bytes: 188743680000
backup_bytes_used: 182011633664
backup_num_devices: 1
backup 1:
backup_tree_root: 8852389888 gen: 46 level: 1
backup_chunk_root: 1048576 gen: 46 level: 1
backup_extent_root: 8843722752 gen: 46 level: 1
backup_fs_root: 8842969088 gen: 46 level: 2
backup_dev_root: 8843755520 gen: 46 level: 0
backup_csum_root: 8843018240 gen: 46 level: 2
backup_total_bytes: 188743680000
backup_bytes_used: 182011633664
backup_num_devices: 1
backup 2:
backup_tree_root: 8853127168 gen: 47 level: 1
backup_chunk_root: 1048576 gen: 46 level: 1
backup_extent_root: 8852865024 gen: 47 level: 1
backup_fs_root: 8852570112 gen: 47 level: 2
backup_dev_root: 8843755520 gen: 46 level: 0
backup_csum_root: 8853192704 gen: 47 level: 2
backup_total_bytes: 188743680000
backup_bytes_used: 182011633664
backup_num_devices: 1
backup 3:
backup_tree_root: 8853389312 gen: 48 level: 1
backup_chunk_root: 1048576 gen: 46 level: 1
backup_extent_root: 8853405696 gen: 48 level: 1
backup_fs_root: 8852570112 gen: 47 level: 2
backup_dev_root: 8843755520 gen: 46 level: 0
backup_csum_root: 8853471232 gen: 48 level: 2
backup_total_bytes: 188743680000
backup_bytes_used: 182011633664
backup_num_devices: 1
$> btrfs insp dump-t -d /dev/nvme0n1p3
btrfs-progs v5.6
checksum verify failed on 1048576 found 00000067 wanted 0000006E
checksum verify failed on 1048576 found 00000067 wanted 0000006E
bad tree block 1048576, bytenr mismatch, want=1048576, have=6267530653245814412
ERROR: cannot read chunk root
ERROR: unable to open /dev/nvme0n1p3
As Andrei Borzenko has stated it is indeed the third superblock:
$> btrfs insp dump-super -a /dev/nvme0n1p3
superblock: bytenr=65536, device=/dev/nvme0n1p3
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0x043ea018 [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 90e9d74c-3606-4028-9e72-c10e76f44a7c
metadata_uuid 90e9d74c-3606-4028-9e72-c10e76f44a7c
label data
generation 49
root 8612052992
sys_array_size 97
chunk_root_generation 46
root_level 1
chunk_root 1048576
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 188743680000
bytes_used 182011633664
sectorsize 4096
nodesize 16384
leafsize (deprecated) 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x161
( MIXED_BACKREF |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
cache_generation 48
uuid_tree_generation 48
dev_item.uuid e2815a2c-6ec8-45c6-baae-7f429a5f0f78
dev_item.fsid 90e9d74c-3606-4028-9e72-c10e76f44a7c [match]
dev_item.type 0
dev_item.total_bytes 188743680000
dev_item.bytes_used 184704565248
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
superblock: bytenr=67108864, device=/dev/nvme0n1p3
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0xa45f88d6 [match]
bytenr 67108864
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 90e9d74c-3606-4028-9e72-c10e76f44a7c
metadata_uuid 90e9d74c-3606-4028-9e72-c10e76f44a7c
label data
generation 49
root 8612052992
sys_array_size 97
chunk_root_generation 46
root_level 1
chunk_root 1048576
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 188743680000
bytes_used 182011633664
sectorsize 4096
nodesize 16384
leafsize (deprecated) 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x161
( MIXED_BACKREF |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
cache_generation 48
uuid_tree_generation 48
dev_item.uuid e2815a2c-6ec8-45c6-baae-7f429a5f0f78
dev_item.fsid 90e9d74c-3606-4028-9e72-c10e76f44a7c [match]
dev_item.type 0
dev_item.total_bytes 188743680000
dev_item.bytes_used 184704565248
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
superblock: bytenr=274877906944, device=/dev/nvme0n1p3
---------------------------------------------------------
ERROR: bad magic on superblock on /dev/nvme0n1p3 at 274877906944
