I have a 8 disk (10.91 TB) wide zraid2 in one data vdev. According to the calculator tool here it should be about 62TB usable capacity. When looking at the usable capacity on the storage dashboard, it says there are 37 TiB usable space available - does not make any sense to me. Thoughts??
Have you, by any chance, used raidz expansion and/or replaced drives in an earlier version of SCALE?
Sorry, no cannot help with earlier versions.