I have a problem or perhaps I'm missing something here? Unraid reports the used cache space as 245GB, while the output of `du -H` run through ssh reports 158GB of used space. I am also unable to manually find browsing via ssh or webgui anything that could be occupying that much space. Any insight would be appreciated.

 

Screenshot of drive setup.

 

I have also attached the diagnostic zip in case it is needed.

trantor-diagnostics-20210311-1216.zip

du isn't reliable with btrfs, space used on the GUI is correct, note that if you have for example a vdisk on cache the file can bloat way beyond the reported used space, this can help with that.

I have added the suggested change to my VM config. It should not be related to my problem as verified after the change the space has free'd a GB or two. I have very little on my cache drive other than 2 vdisks that are capped at 32 and 128 GB. They use 34.4 and 137 GB on the cache respectively (171.4 combined). But other than the vdisks I would guarantee other usage should measure around 5 GB, definitely less than 10GB, from what I can see on the webgui's cache file browser.

Something is using that space, btrfs usage agrees with the GUI, if you're not sure what is a way to find out is to move the files to the array one file or folder at a time.