[From SQL Server Magazine]
As a DBA, one of your many tasks is to manage your SQL Server databases’ ever-expanding storage requirements. How often do you find yourself adding more disk, trying to accurately size a database, or wishing you could more efficiently use your existing disk capacity? Storing database data on a SAN can make such tasks much easier and can also improve disk performance and availability and shorten backup and restore times. Start your search for a SAN here, as you learn the basics of SAN technology and the benefits of using a SAN to store SQL Server databases.
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http://www.windowsitpro.com/SQLServer/Article/ArticleID/48486/48486.html