Saving power without compromising disk drive reliability

We present a robust framework that aims at harvesting future idle intervals for power savings within strict constraints: first, it is imperative to contain the delays in service of IO requests that occur during power savings since the time to bring up the disk is not negligible and second, ensure that the power saving mechanism is triggered few times only, such that the disk wear out due to powering up and down does not compromise its lifetime. Extensive experimentation on a set of enterprise storage traces illustrates frameworks effectiveness.