On Thu, Aug 6, 2009 at 9:18 AM, Dba DBA <oracledbaquestions@xxxxxxxxx>wrote: > does anyone know any good books that explain what happens in the stack when > oracle makes a physical IO (readv OS call) going down to the disk. There is > a stack involved in getting to the SAN. > I found this article good for understanding the basics of the storage as it relates to volumes: http://www.linux-mag.com/cache/7454/1.html Also, SAN for Dummies is good. Hate the title, but is has good info: http://www.amazon.com/Storage-Networks-Dummies-Christopher-Poelker/dp/0764524801 Neither of these explore the stack as you are referring to it, but they do build a foundation for the basic architecture. Jared Still Certifiable Oracle DBA and Part Time Perl Evangelist