Netapp, Inc.

Lsi Logic Corporation

Dennis James Hahn

William Hetrick

Brian Dennis McKean

Jeremy D Stover

Pradeep Ganesan

Russell Winkler

Sarat Chandra Ogirala

A system, method, and computer program product for a block-based backing up a storage device to an object storage service is provided. This includes the generation of a data object that encapsulates a data of a data extent. The data extent covers a block address range of the storage device. The data object is named with a base name that represents a logical block address (LBA) of the data extent. The base name is appended with an identifier that deterministically identifies a recovery point that the data object is associated with. The base name combined with the identifier represents a data object name for the data object. The named data object is then transmitted to the object storage service for backup of the data extent. At an initial backup, the full storage device is copied. In incremental backups afterwards, only those data extents that changed are backed up.

Data backup technique for backing up data to an object storage service

A system and method for recovering data backed up to an object store are provided. In some embodiments, the method includes identifying an address space of a data set to be recovered. A set of data objects stored by an object-based system is identified that corresponds to the address space and a selected recovery point. The identified set of data objects is retrieved, and data contained in the retrieved set of data objects is stored to at least one storage device at a block address determined by the retrieved set of data objects to recreate the address space. In some embodiments, the set of data objects is retrieved by providing an HTTP request and receiving the set of data objects as an HTTP response. In some embodiments, the set of data objects are retrieved based on the data objects being the target of a data transaction.

Data recovery technique for recovering data from an object storage service

A system and method for performing protected-mode data transactions using an initiator cache is provided. In some embodiments, a protected-mode data transaction is received from an initiator. It is determined that the initiator includes an initiator cache having a cache entry associated with the data transaction. A storage controller of a storage system performs the data transaction in conjunction with a storage device such that the performing of the data transaction is initiated before any writing of the data transaction to a cache of any storage controller of the storage system other than the storage controller based on the determination that the initiator includes the cache entry. In some such embodiments, when it is determined the data transaction failed to complete, a request is provided to the initiator to recreate the transaction from the cache entry in the initiator cache.

Systems and methods for a storage array-managed initiator cache

A method and apparatus for providing loop coherency between a multiplicity of nodes. The disclosed technique and apparatus utilize a primary loop for nominal data communications and a normally unutilized secondary loop. A loop coherency circuit detects a loop incoherency condition which results in a interruption of the primary loop. The loop coherency circuit reroutes the flow of data to a secondary loop segment and back to a primary loop segment to provide a continuous coherent arbitrated loop.

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Wichita, KS, United States of America

Dennis James Hahn