August 27, 201510 yr unRAID OS Version: 6.0.1 Description: I've got a couple of cache drives in my setup, 64G and 240G. In the UI the free space graphs are incorrect. Used space on the first drive 64G shows as "nan". How to reproduce: Install two ssd cache drives Expected results: I would expect to see a breakdown per drive just as I do in my array of drive. Actual drive free space shown instead of "nan" Actual results: See attached screen grab Other information:
August 27, 201510 yr I agree that "nan" is a bug, and there are some things about the way this information is displayed even when it is working that is not exactly intuitive. However, the breakdown per drive is probably not what should be displayed. Your btrfs cache pool doesn't store things that way. You really only have 64GB total for both drives together. You would get more by using the 240G by itself, but you wouldn't get mirroring. btrfs disk usage calculator
August 27, 201510 yr I would worry about the temperature of the first cache drive as well, 32 F is pretty cool. How did you make the cache pool? Looks like the UI expects the cache pool to be of the RAID-1 variety in any case...
August 27, 201510 yr Author I agree that "nan" is a bug, and there are some things about the way this information is displayed even when it is working that is not exactly intuitive. However, the breakdown per drive is probably not what should be displayed. Your btrfs cache pool doesn't store things that way. You really only have 64GB total for both drives together. You would get more by using the 240G by itself, but you wouldn't get mirroring. btrfs disk usage calculator Ah, I didn't realize the cache pool was raid-1. I was expecting something more like btrfs-single. I just shutdown my array and added a second SSD to my cache pool expecting to get more space. I need to adjust my expectations or raid settings if possible. Thanks.
August 28, 201510 yr I think the 'nan' has been fixed in 6.1. You can use the 'balance' feature to setup a multi-device 'single' if you want. We'll be expanding on that more in the future.
August 28, 201510 yr Author You can use the 'balance' feature to setup a multi-device 'single' if you want. We'll be expanding on that more in the future. Thanks. Is that in 6.1, also? What's the time line for 6.1 release?
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