News Column

Patent Issued for Prevention of Data Loss Due to Adjacent Track Interference

August 26, 2014

By a News Reporter-Staff News Editor at Information Technology Newsweekly -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Islam, Shah M. R. (Tucson, AZ); Patil, Sandeep R. (Elmsford, NY); Shiraguppi, Riyazahamad M. (Maharashtra, IN); Sivakumar, Gandhi (Bentleigh, AU), filed on January 17, 2012, was published online on August 12, 2014.

The assignee for this patent, patent number 8806117, is International Business Machines Corporation (Armonk, NY).

Reporters obtained the following quote from the background information supplied by the inventors: "Description of the Related Art

"Magnetic storage media is commonly used for data storage in computing systems and devices. Magnetic storage devices generally store data by inducing a targeted magnetic field which causes a portion of a magnetic storage medium to align with the magnetic field. The aligned magnetic storage medium then retains this magnetic orientation even after the magnetic field is removed. Data can be read from medium by sensing or measuring the orientation of the magnetic field at certain portions of the medium.

"However, during a write process the induced magnetic field may interfere with portions of the medium that are not meant to be written to. For example, adjacent or nearby tracks, sectors, clusters, or other storage divisions of a magnetic medium may be exposed to an induced magnetic field. Exposure to the induced magnetic field may actually cause one or more bits of data in an adjacent sector or storage division to degrade such that a magnetic orientation may be lost. Loss of magnetic orientation results in loss of data. The risk of data loss is increased for a portion of the magnetic storage medium each time a nearby storage division is written to. This risk of data loss is often referred to as adjacent track erasure (ATE) or adjacent track interference (ATI) although storage divisions of data smaller than tracks may be affected."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "An apparatus for limiting data loss due to adjacent track interference is disclosed. The apparatus may include a storage module, a tracking module, and a refresh module. The storage module is configured to store a risk value for a tracked storage division. The risk value indicates a risk level of data loss for the tracked storage division. The tracked storage division is one of a plurality of storage divisions of a data storage device. The tracking module is configured to update the risk value to indicate a higher risk level based on a write to a physically proximal storage division. The physically proximal storage division is within an interference range of the tracked storage division. The tracking module is configured to update the risk value based on a write to the tracked storage division. The refresh module is configured to refresh the tracked storage division based on the risk value meeting a threshold value.

"A method and system also perform the functions of the apparatus."

For more information, see this patent: Islam, Shah M. R.; Patil, Sandeep R.; Shiraguppi, Riyazahamad M.; Sivakumar, Gandhi. Prevention of Data Loss Due to Adjacent Track Interference. U.S. Patent Number 8806117, filed January 17, 2012, and published online on August 12, 2014. Patent URL:

Keywords for this news article include: Information Technology, Information and Data Storage, Information and Data Loss and Recovery, International Business Machines Corporation.

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Source: Information Technology Newsweekly

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