RAID (Redundant Array of Idle/Independent Disks) has evolved significantly since the original RAID white paper from the University of California Berkeley (Patterson, Gibson & Katz) was published 20 some years ago and in many cases is taken for granted today. There is also debate as to whether RAID is still relevant and practical given the continued increase amounts of data that needs to be protected.
Sample of some common RAID levels, general characteristics, caveat and benefits
RAID remains relevant today, granted, RAID continues to evolve as do the many variations including distributed and hybrid data protection schemes. Dave Raffo over at SearchStorage has a nice article on "The evolution of RAID data protection" with comments from me. Have a look at the Dave’s article (as well as here) along with some of the comments and thoughts from myself and others.
Ok, nuff said.
Cheers gs
Greg Schulz – Author Cloud and Virtual Data Storage Networking (CRC Press), The Green and Virtual Data Center (CRC Press) and Resilient Storage Networks (Elsevier)
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