Yesterday I received the following tweet: @vMario156 Yes, this was stated in an older version of the best practice guide. 1 IO is currently best practice, not only for 3PAR. — Patrick Terlisten @pterlisten@social.cologne (@PTerlisten) June 5, 2014 Later Craig Kilborn joined the conversation and I decided to clarify this 100 or 1 IOPS myth the next morning. @Craig_Kilborn @vMario156 I check this tomorrow at the office. I don't know why this was changed, but it has changed from 100 to 1 IO.