[blantonl]

I am an active user of EBS on a highly trafficked Web properly, and came from a long and tedious background in enterprise software.

I really think that one paragraph in his blog post summed everything up quite nicely. It could not ring more true:

My opinion is that the only reason the big enterprise storage vendors have gotten away with network block storage for the last decade is that they can afford to over-engineer the hell out of them and have the luxury of running enterprise workloads, which is a code phrase for “consolidated idle workloads.” When the going gets tough in enterprise storage systems, you do capacity planning and make sure your hot apps are on dedicated spindles, controllers, and network ports.