tcharron Posted October 18, 2018 Share Posted October 18, 2018 I just had a cache drive fail. My former configuration was 3 240G SSD drives. That showed 360G of usable space After the failure of one drive, it still showed 360G usable. I figured that was ok, as the data was all there (but no longer protected). I replaced the bad drive with a 512G drive. I expected this to increase the capacity from 360G to 480G. This expectation was confirmed with the calculator at http://carfax.org.uk/btrfs-usage/. That calculator told me that 32G would go unused. This is presumably since everything written to the 2 240G drives would be duplicated on the 512G, with using 480G (and hence 32G left over). In fact, unraid reports that I now have an available cache pool of 496G. This doesn't make sense to me. What am I missing? Quote Link to comment
JorgeB Posted October 18, 2018 Share Posted October 18, 2018 https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=480420 Quote Link to comment
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