EMC Assigned Two Patents

Storage data encryption

EMC Corp., Hopkinton, MA, has been assigned a patent (8,281,152) developed by Douglas E. LeCrone, Hopkinton, Mass., and Paul A. Linstead, Shrewsbury, Mass., for "a storage data encryption".

The abstract of the patent published by the U.S. Patent and Trademark Office states: "Managing data on a storage device includes intercepting unencrypted data to be stored on the storage device, where intercepting unencrypted data is transparent to an application storing the data on the storage device and encrypting the data prior to storage on the storage device. The storage device may include a tape drive and/or a disk drive. Managing data on a storage device may also include migrating data from a first storage location to a second storage location. The first storage location may be the same as the second storage location or the first storage location may be different from the second storage location. The unencrypted data may be intercepted during migration. Managing data on a storage device may also include decrypting data read from the storage device."

The patent application was filed on June 24, 2005 (11/166,956).

Distributed data storage system using local copy operations for RAID-1 volumes

EMC Corp., Hopkinton, MA, has been assigned a patent (8,281,069) developed by Roel van der Goot, and Nathan Bullock, Edmonton, Canada, for a "distributed data storage system using local copy operations for RAID-1 volumes."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "In a distributed RAID-1 (DR1) copy operation, operation of source and target DR1 volumes is first converted to a local-copy operating mode in which the distributed copy operation is converted into a set of local copy operations. Each t is performed at a respective location of the disks of the DR1 volumes and involves copying data of the source DR1 from a first disk to a second disk via a local second communication channel of relatively high bandwidth. Following conversion, the local copy operations are performed at the locations. Upon completion of the local copy operations, storage operations to the source and target DR1 volumes are temporarily suspended, operation of the source and target DR1 volumes is converted back to the normal operating mode, and storage operations to the source and target DR1 volumes are resumed."

The patent application was filed on June 30, 2009 (12/494,515).