Turbo Write   technically known as "reconstruct write" - a new method for updating parity   JonP gave a short description of what "reconstruct write" is, but I thought I would give a little more detail, what it is, how it compares with the traditional method, and the ramifications of using it.   First, where is the setting?  Go to Settings -> Disk Settings, and look for Tunable (md_write_method).  The 3 options are read/modify/write (the way we've always done it), reconstruct write (