On 2017年10月23日 16:39, Wolf wrote: > Hi, > I'm having problem with corruption in one file on my disk array. This is > third time it happened (probably). First time I didn't checked the > offending file so I'm not sure but it's likely. Btrfs scrub finds the > corruption, according to both dmesg and it's output it fixes it. > However, next run finds it too. > > However, according to SMART the disk appears to be healthy (see below). > Plus the corruption is limited to one file. > > Is this and issue somewhere inside btrfs or is disk HW related problem? > > Thank you for your help :) > > W. > > smartctl -a /dev/sde > ==================== > > SMART Attributes Data Structure revision number: 16 > Vendor Specific SMART Attributes with Thresholds: > ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE > 1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0 > 2 Throughput_Performance 0x0005 131 131 054 Pre-fail Offline - 116 > 3 Spin_Up_Time 0x0007 100 100 024 Pre-fail Always - 0 > 4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 8 > 5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0 > 7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0 > 8 Seek_Time_Performance 0x0005 140 140 020 Pre-fail Offline - 15 > 9 Power_On_Hours 0x0012 100 100 000 Old_age Always - 401 > 10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0 > 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 8 > 22 Unknown_Attribute 0x0023 100 100 025 Pre-fail Always - 100 > 192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 33 > 193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always - 33 > 194 Temperature_Celsius 0x0002 147 147 000 Old_age Always - 44 (Min/Max 23/46) > 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0 > 197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0 > 198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0 > 199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0 > > SMART Error Log Version: 1 > No Errors Logged > > SMART Self-test log structure revision number 1 > Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error > # 1 Extended offline Completed without error 00% 357 - > # 2 Short offline Completed without error 00% 335 - > > uname -a > ======== > > Linux ws 4.13.8-1-ARCH #1 SMP PREEMPT Wed Oct 18 11:49:44 CEST 2017 x86_64 GNU/Linux > > btrfs --version > =============== > > btrfs-progs v4.13 > > btrfs fi show > ============= > > Label: none uuid: db7e86f5-649d-44ce-9514-53c7ee0fbe09 > Total devices 2 FS bytes used 9.91GiB > devid 1 size 103.79GiB used 20.03GiB path /dev/mapper/storage1-root > devid 2 size 103.79GiB used 20.03GiB path /dev/mapper/storage2-root > > Label: 'RAID' uuid: 9a4be3ac-e942-4e6a-bb24-2c4009a42572 > Total devices 7 FS bytes used 6.48TiB > devid 1 size 1.82TiB used 715.03GiB path /dev/mapper/data3 > devid 2 size 1.82TiB used 715.00GiB path /dev/mapper/data4 > devid 3 size 2.73TiB used 1.40TiB path /dev/mapper/data2 > devid 4 size 2.73TiB used 1.40TiB path /dev/mapper/data1 > devid 5 size 2.73TiB used 1.40TiB path /dev/mapper/data5 > devid 6 size 2.73TiB used 1.40TiB path /dev/mapper/data6 > devid 7 size 7.28TiB used 5.95TiB path /dev/mapper/data7 > > btrfs fi df /raid > ================= > > Data, RAID1: total=6.47TiB, used=6.47TiB > System, RAID1: total=64.00MiB, used=944.00KiB > Metadata, RAID1: total=9.00GiB, used=7.56GiB > GlobalReserve, single: total=512.00MiB, used=0.00B RAID1 for both data and meta. So if nothing went wrong, it should be fixed. And IIRC RAID1 repair is already tested and checked, so it should not has such problem. > > dmesg > ===== > > [ 0.000000] microcode: microcode updated early to revision 0xba, date = 2017-04-09 > [ 0.000000] random: get_random_bytes called from start_kernel+0x42/0x4b7 with crng_init=0 > [ 0.000000] Linux version 4.13.8-1-ARCH (builduser@tobias) (gcc version 7.2.0 (GCC)) #1 SMP PREEMPT Wed Oct 18 11:49:44 CEST 2017 Arch user here too. > [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=db7e86f5-649d-44ce-9514-53c7ee0fbe09 rw cryptdevice=UUID=eb4011d2-38cd-467d-b515-7acf3ef68f01:storage1:allow-discards cryptkey=rootfs:/boot/crypto_keyfile.bin cryptdevice2=UUID=dd0821ae-8fc4-41d2-aab8-f313e2f6d0e8:storage2:allow-discards cryptkey2=rootfs:/boot/crypto_keyfile2.bin root=/dev/mapper/storage1-root [snip] > [ 5499.268721] lxc_bridge: port 3(vethRUY5VX) entered blocking state > [ 5499.268729] lxc_bridge: port 3(vethRUY5VX) entered disabled state > [ 5499.268759] device vethRUY5VX entered promiscuous mode > [ 5499.268863] IPv6: ADDRCONF(NETDEV_UP): vethRUY5VX: link is not ready > [ 5499.296331] eth0: renamed from vethTO2H20 > [ 5499.321534] IPv6: ADDRCONF(NETDEV_CHANGE): vethRUY5VX: link becomes ready > [ 5499.321603] lxc_bridge: port 3(vethRUY5VX) entered blocking state > [ 5499.321608] lxc_bridge: port 3(vethRUY5VX) entered forwarding state > [22671.887860] perf: interrupt took too long (2508 > 2500), lowering kernel.perf_event_max_sample_rate to 79500 > [24159.239247] perf: interrupt took too long (3154 > 3135), lowering kernel.perf_event_max_sample_rate to 63300 > [27240.680874] perf: interrupt took too long (3952 > 3942), lowering kernel.perf_event_max_sample_rate to 50400 > [30658.875802] BTRFS warning (device dm-12): checksum error at logical 37889245122560 on dev /dev/mapper/data7, sector 2743145096, root 23674, inode 206751, offset 762638336, length 4096, links 1 (path: アニメ/!waiting_for_better_quality/Gate: Jieitai Kanochi nite, Kaku Tatakaeri/GATE Jieitai Kanochi nite, Kaku Tatakaeri 05v2.mp4) Well, it's several seasons ago, and I think there are better BDrip raws now. (Yeah, I'm also an Otaku) Despite that, it's better to hide such personal info though. And, did you tried to scrub the corrupted device other than the whole fs? Btrfs default scrub will start threads to scrub all devices at the same time, maybe some concurrency caused the false alert. Also, it could be possible to check/repair it by using btrfs-progs. Although it's still out-of-tree. Could you please try the following branch and use "btrfs scrub start --offline /dev/mapper/data7" to check if it reports the corruption is fixable? https://github.com/gujx2017/btrfs-progs/tree/offline_scrub Offline scrub gives us a quite good reference on whether it's fixable, without the possible hassle in kernel. So it's worth trying. (But hey, there is better better BDrip raws already, so I don't think you're really interested in fixing the corruption) Thanks, Qu > [30658.875806] BTRFS error (device dm-12): bdev /dev/mapper/data7 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0 > [30658.900322] BTRFS error (device dm-12): fixed up error at logical 37889245122560 on dev /dev/mapper/data7 > [30658.902461] BTRFS warning (device dm-12): checksum error at logical 37889245126656 on dev /dev/mapper/data7, sector 2743145104, root 23674, inode 206751, offset 762642432, length 4096, links 1 (path: アニメ/!waiting_for_better_quality/Gate: Jieitai Kanochi nite, Kaku Tatakaeri/GATE Jieitai Kanochi nite, Kaku Tatakaeri 05v2.mp4) > [30658.902471] BTRFS error (device dm-12): bdev /dev/mapper/data7 errs: wr 0, rd 0, flush 0, corrupt 2, gen 0 > [30658.904943] BTRFS error (device dm-12): fixed up error at logical 37889245126656 on dev /dev/mapper/data7 > [30658.905427] BTRFS warning (device dm-12): checksum error at logical 37889245130752 on dev /dev/mapper/data7, sector 2743145112, root 23674, inode 206751, offset 762646528, length 4096, links 1 (path: アニメ/!waiting_for_better_quality/Gate: Jieitai Kanochi nite, Kaku Tatakaeri/GATE Jieitai Kanochi nite, Kaku Tatakaeri 05v2.mp4) > [30658.905435] BTRFS error (device dm-12): bdev /dev/mapper/data7 errs: wr 0, rd 0, flush 0, corrupt 3, gen 0 > [30658.908247] BTRFS error (device dm-12): fixed up error at logical 37889245130752 on dev /dev/mapper/data7 > [30658.912217] BTRFS warning (device dm-12): checksum error at logical 37889245134848 on dev /dev/mapper/data7, sector 2743145120, root 23674, inode 206751, offset 762650624, length 4096, links 1 (path: アニメ/!waiting_for_better_quality/Gate: Jieitai Kanochi nite, Kaku Tatakaeri/GATE Jieitai Kanochi nite, Kaku Tatakaeri 05v2.mp4) > [30658.912226] BTRFS error (device dm-12): bdev /dev/mapper/data7 errs: wr 0, rd 0, flush 0, corrupt 4, gen 0 > [30658.922809] BTRFS error (device dm-12): fixed up error at logical 37889245134848 on dev /dev/mapper/data7 > [30658.924887] BTRFS warning (device dm-12): checksum error at logical 37889245138944 on dev /dev/mapper/data7, sector 2743145128, root 23674, inode 206751, offset 762654720, length 4096, links 1 (path: アニメ/!waiting_for_better_quality/Gate: Jieitai Kanochi nite, Kaku Tatakaeri/GATE Jieitai Kanochi nite, Kaku Tatakaeri 05v2.mp4) > [30658.924894] BTRFS error (device dm-12): bdev /dev/mapper/data7 errs: wr 0, rd 0, flush 0, corrupt 5, gen 0 > [30658.926522] BTRFS error (device dm-12): fixed up error at logical 37889245138944 on dev /dev/mapper/data7 > [33389.149353] perf: interrupt took too long (4945 > 4940), lowering kernel.perf_event_max_sample_rate to 40200 >
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