Patents by Inventor LEV M. SHUHATOVICH

LEV M. SHUHATOVICH has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Data storage system employing a hot spare to proactively store array data in absence of a failure or pre-failure event
    Patent number: 10241877
    Abstract: A data storage system includes a controller, a hot spare storage device and a plurality of primary storage devices. The controller utilizes the hot spare storage device to mirror only a subset of each stripe of logical pages written across the data storage array, where the subset includes a logical page determined by a write input/output operation (IOP) policy. In response to receipt of a write IOP, the controller writes a stripe including a plurality of logical data pages and a logical data protection page across the plurality of primary storage devices and mirrors the logical page determined by the write IOP policy on the hot spare storage device. In response to a failure of a storage device among the plurality of primary storage devices, contents of the failed storage device not already mirrored on the hot spare storage device are rebuilt on the hot spare storage device.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: March 26, 2019
    Assignee: International Business Machines Corporation
    Inventors: Charles J. Camp, Lev M. Shuhatovich
  • DATA STORAGE SYSTEM EMPLOYING A HOT SPARE TO PROACTIVELY STORE ARRAY DATA IN ABSENCE OF A FAILURE OR PRE-FAILURE EVENT
    Publication number: 20180165169
    Abstract: A data storage system includes a controller, a hot spare storage device and a plurality of primary storage devices. The controller utilizes the hot spare storage device to mirror only a subset of each stripe of logical pages written across the data storage array, where the subset includes a logical page determined by a write input/output operation (IOP) policy. In response to receipt of a write IOP, the controller writes a stripe including a plurality of logical data pages and a logical data protection page across the plurality of primary storage devices and mirrors the logical page determined by the write IOP policy on the hot spare storage device. In response to a failure of a storage device among the plurality of primary storage devices, contents of the failed storage device not already mirrored on the hot spare storage device are rebuilt on the hot spare storage device.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 14, 2018
    Inventors: CHARLES J. CAMP, LEV M. SHUHATOVICH