On 9/5/20 7:31 am, Chris Murphy wrote: > Do you have qgroups enabled? > > $ sudo btrfs qgroup show /home > ERROR: can't list qgroups: quotas not enabled No: $ sudo btrfs qgroup show /home ERROR: can't list qgroups: quotas not enabled > What do you get for: > > $ sudo btrfs insp dump-s /dev/ > > This dumps out the super block. $ sudo btrfs insp dump-s /dev/sda superblock: bytenr=65536, device=/dev/sda --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0x36e3f416 [match] bytenr 65536 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid 85069ce9-be06-4c92-b8c1-8a0f685e43c6 metadata_uuid 85069ce9-be06-4c92-b8c1-8a0f685e43c6 label home generation 59159 root 4881572642816 sys_array_size 258 chunk_root_generation 58225 root_level 1 chunk_root 4925720363008 chunk_root_level 1 log_root 4881575936000 log_root_transid 0 log_root_level 0 total_bytes 12002350252032 bytes_used 4022988615680 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 2 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x161 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 59159 uuid_tree_generation 59159 dev_item.uuid b347d8aa-4563-45db-bcf1-c722e5b3abe8 dev_item.fsid 85069ce9-be06-4c92-b8c1-8a0f685e43c6 [match] dev_item.type 0 dev_item.total_bytes 6001175126016 dev_item.bytes_used 4055589978112 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 > There are scrub related fixes in linux git since 5.4.0 but I can't > tell if any of them are related to this problem. My suggestion is > scrub with kernel 5.7.rc4. If the problem happens, it's a current and > unfixed bug. If it's been fixed, then it's a question of what commit > fixed it and whether it's been backported, or can be, to 5.4 series. OK, I installed 5.7rc4 and rebooted, then started a fresh scrub: $ uname -a Linux RainbowDash 5.7.0-050700rc4-generic #202005051752 SMP Tue May 5 21:56:32 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux After a couple of cancel/resumes here we are again: $ sudo btrfs scrub status -dR /home UUID: 85069ce9-be06-4c92-b8c1-8a0f685e43c6 scrub device /dev/sda (id 1) status Scrub started: Sat May 9 15:52:21 2020 Status: running Duration: 2:25:03 data_extents_scrubbed: 22903068 tree_extents_scrubbed: 194348 data_bytes_scrubbed: 1418082578432 tree_bytes_scrubbed: 3184197632 read_errors: 0 csum_errors: 0 verify_errors: 0 no_csum: 60164 csum_discards: 0 super_errors: 0 malloc_errors: 0 uncorrectable_errors: 0 unverified_errors: 0 corrected_errors: 0 last_physical: 0 scrub device /dev/sdb (id 2) status Scrub started: Sat May 9 15:52:21 2020 Status: running Duration: 2:25:03 data_extents_scrubbed: 22903070 tree_extents_scrubbed: 194348 data_bytes_scrubbed: 1418082648064 tree_bytes_scrubbed: 3184197632 read_errors: 0 csum_errors: 0 verify_errors: 0 no_csum: 60164 csum_discards: 0 super_errors: 0 malloc_errors: 0 uncorrectable_errors: 0 unverified_errors: 0 corrected_errors: 0 last_physical: 0 Duration, time left and bytes scrubbed are not advancing, and last_physical is zero. Thanks, Andrew
