shoe-shining
n.— «When the only target of Tier 4 was tape, the focus was on delivering the data to that tape drive as fast as possible. Tape drives themselves have been plenty fast enough for years now, they’re just not very forgiving if you can’t deliver data to them fast enough. They slow down and have to reposition, commonly called shoe-shining.» —“Tier 4, The End Of The Trail Of Tiers” by George Crump InformationWeek Aug. 20, 2008. (source: Double-Tongued Dictionary)