whiteatom Posted September 1, 2019 Share Posted September 1, 2019 I decided to take the jump and move to a cache pool with 2x SSDs. I am interested in performance, so I want to put the pool in Raid-0 mode - however, I can't get it to Raid at all. Both disks are formatted btrfs, and the Main screen shows cache 2 as "part of a cache pool", however, it doesn't seem like the drives are pooling properly. I have tried running balance with all combinations of -dconvert and -mconvert to try to create a raid-1 or raid-0 pool, but it does nothing. I have rebooted a few times and stopped the array, reformatted the disks/reassigned and started 4 or 5 times now but it always goes to 'single' mode. Here's the status: btrfs filesystem df: Data, single: total=1.00GiB, used=512.00KiB System, single: total=4.00MiB, used=16.00KiB Metadata, single: total=1.01GiB, used=112.00KiB GlobalReserve, single: total=16.00MiB, used=0.00B btrfs balance status: No balance found on '/mnt/cache' btrfs filesystem show: Label: none uuid: 0ce58b4f-32f6-498a-8a12-69520dd7df0e Total devices 1 FS bytes used 640.00KiB devid 1 size 223.57GiB used 2.01GiB path /dev/sdm1 Label: none uuid: 9c56e398-7850-43fb-8b49-33ddd2a47ab7 Total devices 1 FS bytes used 2.48GiB devid 1 size 15.00GiB used 6.02GiB path /dev/loop2 Label: none uuid: fd17d78f-f3ed-49a7-b75f-3cbfcea2b3d4 Total devices 1 FS bytes used 292.00KiB devid 1 size 32.00GiB used 536.00MiB path /dev/loop3 Label: none uuid: 29297bfe-a789-46f8-9020-724cc95e40c6 Total devices 1 FS bytes used 128.00KiB devid 1 size 223.57GiB used 20.00MiB path /dev/sdn1 From what I see online, this last command should list 2 devices under one uuid, but mine is not. I've searched the forums a bit, but everything assumes the pool is in raid-1 mode to start - which mine is not. UnRAID: 6.7.2; basic dockers (plex, sabnzbd, radarr/sonarr) Cache is empty (backed up elsewhere while I try to get this going). Can anyone point me in the right direction to create a Raid-0 cachepool? Thank-you! Quote Link to comment
JorgeB Posted September 2, 2019 Share Posted September 2, 2019 Please post the diagnostics: Tools -> Diagnostics Quote Link to comment
whiteatom Posted September 2, 2019 Author Share Posted September 2, 2019 Attached - thanks. knox-diagnostics-20190902-1242.zip Quote Link to comment
JorgeB Posted September 2, 2019 Share Posted September 2, 2019 Cache2 isn't part of the pool, stop the array, unassign cache2, start array, stop array, start array and re-assign cache2, that should do it, if it doesn't post new diags, ideally reboot before doing it to clear the logs. Quote Link to comment
whiteatom Posted September 3, 2019 Author Share Posted September 3, 2019 Will do when I get home again. Cache2 says "drive is part of a cache pool" where it should show the drive capacity/usage on the Main screen. What would cause it to show that if it's not assigned? Quote Link to comment
JorgeB Posted September 3, 2019 Share Posted September 3, 2019 Sometimes this happens, to know why it happened this time would need the diags from when the device was added to the pool, the ones posted are after that. Quote Link to comment
whiteatom Posted September 4, 2019 Author Share Posted September 4, 2019 Ok.. I unassigned and assigned a few times then reboot without any change. However, I unassigned, rebooted and then reassigned and it seems to work now. I guess I didn't try that combination before, so it's all working now. Thanks! Quote Link to comment
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