This article is from the storage FAQ part1, by Rodney D. Van Meter with numerous contributions by others.
The RAIDBook, a 100+ page tutorial on RAID technology and the RAID Advisory Board, is available from Technology Forums, LTD, of 6931 Glenview Lane, Lino Lakes, MN 55014-1296. Contact Joe Molina, President of Technology Forums at <XXX> (phone numbers no longer valid?) (rdv,97/3) I've read it, it's decent but a little repetitive. Defines many low-level terms of interest only to those who need to know the internals. (rdv,95/2/7)