This was much-needed. Curtis Preston has taken on a subject that, even in the disinformation-stuffed world of IT, stands out as one of the least understood (or most mis-understood - if you can make the distinction).
There is plenty of nonsense spoken about SANs and NAS, where they differ, and where they coincide. In good old O'Reilly style, this volume gives a balanced opinion and an excellent place to start.
If you htink your job will take you to a place where you will be having dialogue on the subject of Storage Networks, a skim of this volume will serve you well.