Sorry for asking a question that has almost certainly been solved already on this forum, but I wasn't able to find a solution.
Some background: I have a ~20TB pool made up of 3TB and 4TB drives and 2 SSDs (with SSD optimizer) witha mixture of duplicated and unduplicated data.
Last week I had a 3TB drive fail. I knew it was on its way out and only had duplicated data on it. It failed by simply disappearing from my system ("Drive Missing").
From there I:
"Removed" the missing drive and let DrivePool do its thing. After a day or more the drivepool was still stuck in a balancing/measuring act. It looked to me like it might be struggling because there simply wasnt enough room to properly duplicate everything again. I proceeded to disable duplication on a few unimportant folders to free up space. I was running with about 1TB of free space. Things appeared happy although to be honest I wasn't paying much attention to it. Today I installed a new 8TB drive into the pool. For the next 7 or so so hours it was stuck in a "measuring" loop I will call it. Just when it looked like it was about to finish figuring out what is duplicated and unduplicated, it would start all over again. It did this all day I think. It may have tried to do some balancing as well, but it didn't get anywhere. I tried rebooting. Disabled anti-virus. Disabled anything that regularly accessed the drive. No data was ever moved to the 8TB drive. I changed the balancing settings to attempt to force it to balance (Unchecked "Not more often than...", changed balance ratio to 100%). For 30 or so minutes it looked like it was balancing (got up to 2.1%). Some data showing up on the 8TB drive. Then it reset and started measuring again. Now it's just in a measuring loop again where it figures out what all of the "Other" is (Duplicated or Unduplicated) and then it resets and starts figuring it out all over again.
The main concerns I have now is that
The SSDs are completely filled for some reason (refer to first screenshot). The SSD optimizer setting is Fill up to 75%. They have been filled like this since before I put the new 8TB drive in. There is 6.10TB of data "Unusable for duplication" and I don't know what that means or why that is? Every time it starts balancing it goes back to measuring after some time. (refer to second and more recent screenshot)
Will these items resolve themselves or is there something I should be doing to alleviate the issue?
Edit: Update: After another 8 hours it is still in a "Measuring" loop and only about 300GB has moved to the 8TB drive. SSDs are still basically full (well, one is, the other is about 85%).