Patents by Inventor Ammar A. Zayed

Ammar A. Zayed 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 device dynamically relocating data sectors based on map-out value
    Patent number: 11531582
    Abstract: A data storage device is disclosed comprising a non-volatile storage medium (NVSM) having a plurality of data sectors and a plurality of reserve sectors. A map-out value is generated for each of a first plurality of the data sectors based on a read latency of each of the first plurality of data sectors, and when the map-out value of a first data sector in the first plurality of data sectors exceeds a threshold, a first logical block address (LBA) is mapped from the first data sector to a first reserve sector. When the map-out value of a second data sector in the first plurality of data sectors exceeds the map-out value of the first data sector, the first LBA is mapped from the first reserve sector back to the first data sector, and a second LBA is mapped from the second data sector to the first reserve sector.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: December 20, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Bernd Lamberts, Remmelt Pit, Abhishek Srivastava, Karthik Venkatesh, Ammar A. Zayed
  • DATA STORAGE DEVICE DYNAMICALLY RELOCATING DATA SECTORS BASED ON MAP-OUT VALUE
    Publication number: 20220027226
    Abstract: A data storage device is disclosed comprising a non-volatile storage medium (NVSM) having a plurality of data sectors and a plurality of reserve sectors. A map-out value is generated for each of a first plurality of the data sectors based on a read latency of each of the first plurality of data sectors, and when the map-out value of a first data sector in the first plurality of data sectors exceeds a threshold, a first logical block address (LBA) is mapped from the first data sector to a first reserve sector. When the map-out value of a second data sector in the first plurality of data sectors exceeds the map-out value of the first data sector, the first LBA is mapped from the first reserve sector back to the first data sector, and a second LBA is mapped from the second data sector to the first reserve sector.
    Type: Application
    Filed: July 22, 2020
    Publication date: January 27, 2022
    Inventors: Bernd Lamberts, Remmelt Pit, Abhishek Srivastava, Karthik Venkatesh, Ammar A. Zayed
  • Data storage device screening heads by verifying defects after defect scan
    Patent number: 9117489
    Abstract: A data storage device is disclosed comprising a head actuated over a disk comprising a plurality of tracks. A defect scan of at least one of the tracks is executed, and a log entry is generated when a defect is detected. After the defect scan, a verify operation is executed for at least two of the detected defects. A number of times the verify operation detects a false defect is counted, and whether the head is defective is determined based at least partly on the count.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: August 25, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Dean V. Dang, Chun Sei Tsai, Chirag C. Patel, Ammar A. Zayed, Carl E. Barlow, Thao Hieu Banh