If you or anybody else would be willing to test it:
Requirements: your nodes trash folder must already have trash in it.
Set your storage limit so that your dashboard says that you have a small amount of space available but less than the size of the contents of your trash folder. Start node and check log file to see if uploads are failing with an “out of space” error, example below;
upload failed {"Piece ID": "FFJFP2CGEIA6OKWLXWRXJMKFDF2VMTKSNFBNLNKQRZHBU5KQMUNQ", "Satellite ID": "12L9ZFwhzVpuEKMUNUqkaTLGzwY9G24tbiigLiXpmZWKwmcNDDs", "Action": "PUT", "error": "out of space", "errorVerbose": "out of space\n\tst