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Fault-Tolerant Key Arrays Disclosure Number: IPCOM000035990D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28

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Hanrahan, DJ Huang, KC Stein, CJ [+details]


Disclosed is a method of operating a fault-tolerant key array which increases the retriability of failing storage operations involving implicit and explicit storage protection key accesses. The method involves storing a protection key in both primary and secondary key arrays in certain system configurations without additional product cost and maintaining one single key array part number. The secondary key arrays become the redundant backup key arrays for predefined storage address ranges.