This article is from the storage FAQ part2, by Rodney D. Van Meter with numerous contributions by others.
This compilation of material is copyright Rod Van Meter, firstname.lastname@example.org. Permission is granted to copy this material, provided this copyright notice is retained. The contents are not to be significantly modified without the express written consent of the author. This is just to keep the various authors of this material from being substantially misquoted or abused, not to restrict use of the information. Permission to include this FAQ in published compilations (CD-ROM or book) will be granted upon direct request.