Hi, hoping someone can help with this issue I am having. I have a pool setup as D:RAID6/M:RAID1 which I converted to that from D/M:RAID1 about a month ago. Since I did that I have been wanting to remove one of my drives from the pool. However, whenever I do it crashes the whole system after running for about 24 hours. This is my third or fourth attempt with it happening and I have updated my kernel and btrfs-progs hoping it would solve the issue Since the last time it happened I have run a full balance and a scrub and both complete without any issues. I do this between every attempt. But when I try to do the remove it crashes the whole system and I have to reset. Right now a scrub is running since this is RAID6 and suggested to be done after any unclean shutdown. Should be done in 24 hours. At the moment of the crash the system was being used as a plex server and had three streams going, and some other services. So reads with some writes going on at the same time. Remove had been going for maybe 24 hours before it locked up. Here is hopefully all the info you need, but please let me know if anything else is required I am trying to remove one of the 3TB drives (sdb) My device stats shows 1 corruption_errs for one drive that has been there for a while so no errors have come up with these delete attempts Pool was created many years ago, and I have been keeping up to date on kernel versions and btrfs-progs manually. System info Ubuntu 18.04 Kernel: Linux FileServer 5.5.7-050507-generic #202002281805 btrfs-progs v5.4.1 device usage /dev/sdd1, ID: 1 Device size: 2.73TiB Device slack: 0.00B Data,RAID6: 1.16TiB Data,RAID6: 810.74GiB Data,RAID6: 791.52GiB Unallocated: 1.00MiB /dev/sdb1, ID: 2 Device size: 2.73TiB Device slack: 0.00B Data,RAID6: 1.16TiB Data,RAID6: 605.74GiB Data,RAID6: 6.00GiB Unallocated: 990.52GiB /dev/sdc1, ID: 3 Device size: 2.73TiB Device slack: 0.00B Data,RAID6: 1.16TiB Data,RAID6: 810.74GiB Data,RAID6: 791.52GiB Unallocated: 1.00MiB /dev/sdi1, ID: 5 Device size: 2.73TiB Device slack: 1.36TiB Data,RAID6: 1.16TiB Data,RAID6: 205.00GiB Unallocated: 1.00MiB /dev/sdh1, ID: 6 Device size: 4.55TiB Device slack: 0.00B Data,RAID6: 1.16TiB Data,RAID6: 810.74GiB Data,RAID6: 581.00GiB Data,RAID6: 791.52GiB Data,RAID6: 6.00GiB Metadata,RAID1: 3.00GiB System,RAID1: 32.00MiB Unallocated: 1.24TiB /dev/sda1, ID: 7 Device size: 7.28TiB Device slack: 0.00B Data,RAID6: 1.16TiB Data,RAID6: 810.74GiB Data,RAID6: 581.00GiB Data,RAID6: 791.52GiB Data,RAID6: 6.00GiB Unallocated: 3.97TiB /dev/sdf1, ID: 8 Device size: 7.28TiB Device slack: 0.00B Data,RAID6: 1.16TiB Data,RAID6: 810.74GiB Data,RAID6: 581.00GiB Data,RAID6: 791.52GiB Data,RAID6: 6.00GiB Metadata,RAID1: 9.00GiB System,RAID1: 32.00MiB Unallocated: 3.97TiB /dev/sdj1, ID: 9 Device size: 7.28TiB Device slack: 0.00B Data,RAID6: 1.16TiB Data,RAID6: 810.74GiB Data,RAID6: 581.00GiB Data,RAID6: 791.52GiB Data,RAID6: 6.00GiB Metadata,RAID1: 10.00GiB Unallocated: 3.96TiB fi show Label: 'Pool1' uuid: 99935e27-4922-4efa-bf76-5787536dd71f Total devices 8 FS bytes used 14.91TiB devid 1 size 2.73TiB used 2.73TiB path /dev/sdd1 devid 2 size 2.73TiB used 1.76TiB path /dev/sdb1 devid 3 size 2.73TiB used 2.73TiB path /dev/sdc1 devid 5 size 1.36TiB used 1.36TiB path /dev/sdi1 devid 6 size 4.55TiB used 3.31TiB path /dev/sdh1 devid 7 size 7.28TiB used 3.30TiB path /dev/sda1 devid 8 size 7.28TiB used 3.31TiB path /dev/sdf1 devid 9 size 7.28TiB used 3.31TiB path /dev/sdj1 fi df Data, RAID6: total=15.20TiB, used=14.90TiB System, RAID1: total=32.00MiB, used=1.09MiB Metadata, RAID1: total=11.00GiB, used=9.58GiB GlobalReserve, single: total=512.00MiB, used=0.00B fi usage WARNING: RAID56 detected, not implemented Overall: Device size: 35.93TiB Device allocated: 22.06GiB Device unallocated: 35.91TiB Device missing: 0.00B Used: 19.17GiB Free (estimated): 0.00B (min: 8.00EiB) Data ratio: 0.00 Metadata ratio: 2.00 Global reserve: 512.00MiB (used: 0.00B) Data,RAID6: Size:15.20TiB, Used:14.90TiB (98.06%) /dev/sdd1 2.73TiB /dev/sdb1 1.76TiB /dev/sdc1 2.73TiB /dev/sdi1 1.36TiB /dev/sdh1 3.30TiB /dev/sda1 3.30TiB /dev/sdf1 3.30TiB /dev/sdj1 3.30TiB Metadata,RAID1: Size:11.00GiB, Used:9.58GiB (87.11%) /dev/sdh1 3.00GiB /dev/sdf1 9.00GiB /dev/sdj1 10.00GiB System,RAID1: Size:32.00MiB, Used:1.09MiB (3.42%) /dev/sdh1 32.00MiB /dev/sdf1 32.00MiB Unallocated: /dev/sdd1 1.00MiB /dev/sdb1 987.52GiB /dev/sdc1 1.00MiB /dev/sdi1 1.00MiB /dev/sdh1 1.24TiB /dev/sda1 3.97TiB /dev/sdf1 3.96TiB /dev/sdj1 3.96TiB DMESG Log: https://pastebin.com/w09F4nMr PS. I think my first message was blocked due to being over 100k, so I am resending with pastebin for DMESG. Sorry if there is a duplicate.
