One of the concepts that is relevant when it comes to Database Storage is how is the data organized on disks. In today's world we have SAN's which are very powerful , I am pretty sure lot of advances have been made in the areas of storage. One of the often looked into concept is the concept of RAID levels, how one should configure database storage and what RAID level to use for the Database Servers. Here is a link which provided a good overview of different RAID levels. I am more of developer than a Database Administrator. The link below gives us a good introduction to the RAID concepts.