title: AWS EBS block size
body: <p>Can you point me to some resources on how EBS works behind the scenes for gp2 volumes?
  The way I understand it, it is a service, but really it is some form of connecting arrays of SSD drives to the instance, in a redundant way
  What is the actual, physical method of connecting?
  THe documentation refers to the fact that data is transferred in 16KB or 256KB blocks, but I can't find any more about that.
  If for example, in Linux, my partition is formatted with 4KB blocks, does this mean that EBS will transfer data to and from disk with 16KB block, if so wouldn't it make sense to also format the partition with 16KB block and also optimise it upstream?
  If I have a set of very random 4k operations, will this trigger the same amount of 16KB block requests?
  If anyone's done such testing already, I'd really like to hear it...</p>