Patents Assigned to JPMorgan Chase Bank, as Collateral Agent
  • Write head collision detection using MR read element in disc drives
    Patent number: 6822814
    Abstract: An apparatus and associated method for detecting head collision with disc media, or other matter, during a write operation is disclosed. The method and apparatus generally monitor the resistance of an MR element on the head in order to detect a temperature increases indicative of a head collision. The resistance can be compared to a pre-selected threshold to generate an output indicative of head collision.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: November 23, 2004
    Assignee: JPMorgan Chase Bank, As Collateral Agent
    Inventors: WeiLoon Ng, Myint Ngwe, QuekLeong Choo, EngHock Lim, KokHoe Chia, CheeWai Lum
  • Disc drive with fake defect entries
    Patent number: 6747825
    Abstract: A disc drive includes a base and a disc rotatably attached to the base. The disc drive is formatted by obtaining a list of defective sector entries, determining a first location of selected information based on skipping the defective sectors within the list of defective sector entries, and calculating a second location for selected information. At least one sector to skip is added before the second location of selected information to move the selected information from the first position to the second position. The added sectors may be designated as defective sectors. By adding the at least one sector to skip, the second position of the information is moved or slipped.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: June 8, 2004
    Assignee: JPMorgan Chase Bank, as Collateral Agent
    Inventors: Wei Loon Ng, Beng Wee Quak, YongPeng Chng, Wesley Wing Hung Chan, Patrick Tai Heng Wong