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AssigneeNetwork Appliance, Inc.
InventorsRobert M. English, Peter F. Corbett, Steven R. Kleiman
Estimating the term…
A technique efficiently corrects multiple storage device failures in a storage array using a combination of a single diagonal parity group and multiple row parity groups. The storage array comprises a plurality of concatenated sub-arrays, wherein each sub-array includes a set of data storage devices and a parity storage device. Each row parity group is associated with a sub-array of the array. The array further includes a global parity storage device holding diagonal parity computed across the concatenation of the sub-arrays. Instead of requiring that each parity group contain both a row parity device and a diagonal parity device, the array is composed of a collection of row parity groups. Diagonal parity is calculated across the full array.
A system adapted to correct multiple storage device failures in a storage array using a combination of multiple first parity groups and a single secondary parity group, the system comprising:
A method for correcting double failures in a storage array using a combination of a single diagonal parity group and multiple row parity groups, the method comprising the steps of:
Apparatus for correcting double failures in a storage array using a combination of a single diagonal parity group and multiple row parity groups, the apparatus comprising:
A computer readable medium containing executable program instructions for correcting double failures in a storage array using a combination of a single diagonal parity group and multiple row parity groups, the executable program instructions comprising program instructions for:
A system adapted to correct multiple storage element failures in an array using a combination of multiple first failure recovery groups and a single secondary failure recovery group, the system comprising:
Dependencies are inferred from the claim text.