PC users of a certain age will be all too familiar with defragging and disk checking, normally as a last-ditch attempt to reinvigorate a flagging or faulty system. Fast-forward to 2012, and Microsoft is reassessing the role of the whole NTFS health model for the modern world (well, Windows 8 at least). It turns out that these days actual corruptions are rare, but people still like to run chkdsk just in case -- or out of habit. In the old approach, health check was either happy or unhappy, and the machine was taken offline for as long as was needed to fix. Even with optimization a
