There are other things that the I/O setup script will do as well, like making sure your filesystem can handle async I/O properly and is fully patched, etc. It i

There are other things that the I/O setup script will do as well, like making sure your filesystem can handle async I/O properly and is fully patched, etc. It is indeed designed to be run everytime anything major changes in your deployment (like if you deploy to other machines, add more disks, etc)