Pure Storage Assigned Two Patents

Intra-device data protection in RAID
Pure Storage, Inc., Mountain View, CA, has been assigned a patent (8,463,991) developed by four co-inventors for an "intra-device data protection in a RAID array."

The co-inventors are John Colgrove, Los Altos, CA, John Hayes, Bo Hong, Mountain View, CA, and Ethan Miller, Santa Cruz, CA.

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A system and method for intra-device data protection in a RAID array. A computer system comprises client computers and storage arrays coupled to one another via a network. A storage array utilizes SSDs and flash memory cells for storage. A storage controller within a storage array is configured to identify a unit of data stored in the storage subsystem, wherein said unit of data is stored across at least a first storage device and a second storage device of the plurality of storage devices, each of the first storage device and the second storage device storing intra-device redundancy data corresponding to the unit of data; and change an amount of intra-device redundancy data corresponding to the unit of data on only the first storage device."

The patent application was filed on Sept. 28, 2010 (12/892,535).

Scheduling of I/O writes in a storage environment
Pure Storage, Inc., Mountain View, CA, has been assigned a patent (8,468,318) developed by six co-inventors for a "scheduling of I/O writes in a storage environment."

The co-inventors are John Colgrove, Los Altos, CA, John Hayes, Bo Hong, Mountain View, CA, Feng Wang, Sunnyvale, CA, Ethan Miller, Santa Cruz, CA, and Craig Harmer, San Francisco, CA.

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A system and method for scheduling read and write operations among a plurality of solid-state storage devices. A computer system comprises client computers and storage arrays coupled to one another via a network. A storage array utilizes SSDs and flash memory cells for storage. A storage controller within a storage array comprises an I/O scheduler. The storage controller is configured to receive requests targeted to the storage medium, said requests including a first type of operation and a second type of operation. The controller is further configured to schedule requests of the first type for immediate processing by said plurality of storage devices, and queue requests of the second type for later processing by the plurality of storage devices. Operations of the first type may correspond to operations with an expected relatively low latency, and operations of the second type may correspond to operations with an expected relatively high latency."

The patent application was filed on Sept. 15, 2010 (12/882,877).