a10waveracer Posted January 29, 2022 Share Posted January 29, 2022 Tried to add a 500GB SSD as a second drive (btrfs cache pool) to my existing 250GB SSD cache with the eventual goal of transitioning all of the data to the 500GB drive. After 24+ hours of waiting I finally pulled down some logs and started digging into the issue. When I first attempted to debug the issue, I could see that there was a btrfs balance command running with 0% progress that couldn't be stopped. I couldn't pause/cancel that balance. What's the preferred path out of this? I was considering manually removing the sdh drive from the btrfs pool, but wasn't sure if that would just give me more trouble... FYI I would include full diagnostics but now my CPU gets pegged to 100% via kworker (self-detected stall CPU : btrfs_async_reclaim_data_space) when I try to start the array, so I only have the unredacted diagnostics. I've attached a reduced syslog from my initial diagnostics. root@unRAID:~# btrfs device stats /mnt/cache [/dev/sdg1].write_io_errs 0 [/dev/sdg1].read_io_errs 0 [/dev/sdg1].flush_io_errs 0 [/dev/sdg1].corruption_errs 0 [/dev/sdg1].generation_errs 0 [/dev/sdh1].write_io_errs 0 [/dev/sdh1].read_io_errs 0 [/dev/sdh1].flush_io_errs 0 [/dev/sdh1].corruption_errs 0 [/dev/sdh1].generation_errs 0 root@unRAID:~# btrfs fi show /mnt/cache Label: none uuid: 8611f812-bd82-4599-bba5-f35f17010bf5 Total devices 2 FS bytes used 157.14GiB devid 1 size 232.89GiB used 232.89GiB path /dev/sdg1 devid 2 size 465.76GiB used 0.00B path /dev/sdh1 root@unRAID:~# btrfs fi df /mnt/cache Data, single: total=230.87GiB, used=156.50GiB System, single: total=4.00MiB, used=48.00KiB Metadata, single: total=2.01GiB, used=653.88MiB GlobalReserve, single: total=211.67MiB, used=0.00B syslog-reduced.rtf Quote Link to comment
Solution JorgeB Posted January 30, 2022 Solution Share Posted January 30, 2022 If you still have access to the pool you should back it up then re-format. Quote Link to comment
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