I'll be honest. i haven't encountered a single workload in which i had to write over 90 GByte over 30 seconds (3gbyte sustained for 30 seconds), so you could be correct. Even benchmarks are generally done within 10-15 seconds and my IO is usually constrained by network or CPU at that point.

not sure how that would in any way impact a hibernate routine which would very rarely have to store more then 64gb though.