Patents by Inventor Glenn Chek Heong Cheng

Glenn Chek Heong Cheng 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).

  • Method and apparatus for operating a disk drive
    Patent number: 8654619
    Abstract: A disk drive is disclosed including a rotatable disk having a user area including a first sector, and a spare area including a second sector, and configured to store a relocation list. The disk drive also includes a controller configured to receive a write command to write first data to the first sector, determine that the first data includes an amount of data less than a storage capacity of the first sector, read second data in the first sector, determine that there is a read error when reading the second data in the first sector, temporarily relocate the first sector to the second sector, maintain the second data in the first sector, and perform a test on the first sector to determine whether to copy the first data to the first sector, or permanently relocate the first sector to the second sector.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: February 18, 2014
    Assignee: Western Digital Technologies, Inc.
    Inventor: Glenn Chek Heong Cheng