The term `` RAID '' was first used by David Patterson , Garth A. Gibson , and Randy Katz at the University of California , Berkeley in 1987 , standing for redundant array of inexpensive disks .
In 1988 , the different types of RAID ( 1 to 5 ) , were written about by David Patterson , Garth Gibson and Randy Katz in their article , called `` A Case for Redundant Arrays of Inexpensive Disks ( RAID ) '' .