Greetings Sorry if this is way off this List: Working on Storage for Databases, The Goal is : how much space should we have to add to make %free 40% for a given Filesystem This detail comes from df -k output and or from tablespace free output I know the following values for a given FS either from df -k or from tablespace calcualtion: Allocated GB Used GB Free GB %USed %Free (even though %used and %free values never add for a df -k output) I need a formula to come up with a new Allocation size if %free is at 40% (which means %used will be at 60%) Brain is not thinking stright, appreciate your feedback (My math is not adding up to the xl I have been sent for the new storage required to set all FS at 40% Free) -- Regards & Thanks BN