DoQtorNo

I am trying to set up an array for hdd from an old machine that had windows server on it. When I try to setup an arry and start the parity on a couple of them, the other 3 in the pool says unmount able or wrong file type. I changed changing the file type to the appropriate one but i only get those status messages once i start the array. I may be versions old but is there a format button or something? Is there a way I can change the file system in unraid? TIA