Gico Posted June 9, 2021 Share Posted June 9, 2021 How do I shrink a non-redundant 3 disks array pool? FAQ says this might be unofficially supported. Final goal is to remove this cache pool entirely. Quote Link to comment
trurl Posted June 9, 2021 Share Posted June 9, 2021 Why do you need to shrink it if you are removing it? Quote Link to comment
Gico Posted June 9, 2021 Author Share Posted June 9, 2021 After the disk will be taken out of the pool, I will copy data from the pool to that disk in order to allow the next pool shrink. Quote Link to comment
trurl Posted June 10, 2021 Share Posted June 10, 2021 Just move the data to the array, reconfigure your pools however you want, and move the data back to pools. Quote Link to comment
Gico Posted June 10, 2021 Author Share Posted June 10, 2021 That's a lot of data and time to copy twice instead of once. Any other way is better. Quote Link to comment
JorgeB Posted June 10, 2021 Share Posted June 10, 2021 I wouldn't recommend using the GUI since it might not work, you can still do it manually, if you want to do that I can post instructions, please post diags and let me know which device you want to remove first. Quote Link to comment
Gico Posted June 10, 2021 Author Share Posted June 10, 2021 OK for CLI. I was quite sure the GUI doesn't support this. Pool is chiapool, 3x12TB disks. I don't care which one is removed from the array. I began to read how to do that and if i got this right I should run: btrfs device delete /dev/sdw1 /mnt/chiapool juno-diagnostics-20210610-1531.zip Quote Link to comment
JorgeB Posted June 10, 2021 Share Posted June 10, 2021 1 hour ago, Gico said: btrfs device delete /dev/sdw1 /mnt/chiapool That's it, but there's one more step once it finishes, you can't just unassign the removed device and start array, you need to stop array, unassign all 3 pool devices, start array (check "I'm sure box") to make Unraid forget that pool config, then stop array, re-assign the two remaining pool devices and start array again. 1 Quote Link to comment
Gico Posted June 12, 2021 Author Share Posted June 12, 2021 Worked like a charm. Thanks a lot! 1 Quote Link to comment
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