Always set noatime no diratime on all partitions! I/O Boost! - by dorimanx from anarkia1976/AK-xGenesis

Also mod read_ahead to 512. as seems that is faster! in test apps.

https://github.com/anarkia1976/AK-xGenesis/commit/e879557ce6e2e99a3f64fd43be0818eef10ae7cb#diff-3fbed1fd4d15699b74b30cabf5be8133R2200
https://github.com/anarkia1976/AK-xGenesis/commit/77376604c83ec7856e954d2f6c3d4092d2a1199d