ArdNsc

Thank you from me (being one of the complainers...) as well. :-)

Regarding the latest release of the 7.4 branch (7.4.0-rc.2) you state: How can you at the same time argue that the two current branches are 7.4 and 7.3? Thats confusing, to say the least. I strongly believe you should support 7.2 until 7.4 is released as a stable branch.

same problem here

I did what you recommended. Have a new Pool with zfs raidz1 now. Thanks for the help.

Shows: [20036.654570] BTRFS: device fsid 0530b4fe-e499-4564-9465-33258fc10a71 devid 1 transid 236169 /dev/mapper/nvme1n1p1 (251:10) scanned by mount (1699987) [20036.654939] BTRFS info (device dm-10): first mount of filesystem 0530b4fe-e499-4564-9465-33258fc10a71 [20036.654949] BTRFS info (device dm-10): using crc32c (crc32c-lib) checksum algorithm [20036.705027] BTRFS info (device dm-10): enabling ssd optimizations [20036.705031] BTRFS info (device dm-10): enabling free space tree [20036.707844] BTRFS info (device dm-10 state M): turning on async discard [20088.423435] BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5 [20150.855244] BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5 [20800.756898] BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5 [42723.637158] BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5 Shows: [/dev/mapper/sdl1].write_io_errs 0 [/dev/mapper/sdl1].read_io_errs 0 [/dev/mapper/sdl1].flush_io_errs 0 [/dev/mapper/sdl1].corruption_errs 0 [/dev/mapper/sdl1].generation_errs 0 [/dev/mapper/sdm1].write_io_errs 0 [/dev/mapper/sdm1].read_io_errs 0 [/dev/mapper/sdm1].flush_io_errs 0 [/dev/mapper/sdm1].corruption_errs 0 [/dev/mapper/sdm1].generation_errs 0 [/dev/mapper/sdk1].write_io_errs 0 [/dev/mapper/sdk1].read_io_errs 0 [/dev/mapper/sdk1].flush_io_errs 0 [/dev/mapper/sdk1].corruption_errs 0 [/dev/mapper/sdk1].generation_errs 0 [/dev/mapper/sdj1].write_io_errs 0 [/dev/mapper/sdj1].read_io_errs 0 [/dev/mapper/sdj1].flush_io_errs 0 [/dev/mapper/sdj1].corruption_errs 0 [/dev/mapper/sdj1].generation_errs 0 [devid:5].write_io_errs 0 [devid:5].read_io_errs 0 [devid:5].flush_io_errs 0 [devid:5].corruption_errs 0 [devid:5].generation_errs 0

I will be afk for a few hours now; in the meantime I try to move some files off the pool onto the array in case I have to create a new pool. No critical data on the pool (all backed up), but it would be much less pain if I didn't have to gather everything back together from backups.

yes

Adds only one line to the syslog: Jun 16 15:35:21 Silver kernel: BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5

Output: Error: error removing device 'missing': Input/output error

Yes, I do. (But I did what you suggested and recreated the pool with all 5 devices.) Should I try to run another balance now?

Attached new diagnostics

That worked fine. Please do. And do I add the pool with 4 or 5 disks? Remember, I was trying to remove one of them.

I stopped the array to remove a cache disk (I have 5 disk btrfs raid 5 as cache pool). I restarted the array, as expected the cache pool showed as degraded. I started a balance, which went surprisingly fast (too fast to have worked as I expected). I stopped the array again. I tried to start the array again, start array button did nothing. Pressed it 1-2 more times. No effect. I initiated a soft reboot. Then the GUI did not show up. I attached Monitor and Keyboard, soft rebooted once more. Still no GUI Rebooted in GUI mode, GUI does not work there either (no GUI loading in localhost). Attached latest Diagnostics. Help would be much appreciated. Thanks. Edit: GUI also does not show up in safe boot gui mode.

my condolences

I did that with the first folder now. While I got around 1TB free space on the old drive on the new target drive it took around 2TB of space, regarding to the used/free columns in the unraid UI. What I should have mentioned is that the fs on the "old" drive ("disk5") is btrfs and on the "new" one ("disk3") is zfs. Is that a problem?