Patents by Inventor Roger G. Cath

Roger G. Cath 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 method and subsystem including a device controller for respecifying an amended start address
    Patent number: 5555390
    Abstract: A data storage subsystem and method for transferring data from a storage subsystem to a connected host data processing system are described. The subsystem comprises a device controller connected to one or more direct access storage devices e.g. disk drives. The host data processing system issues data transfer commands to the subsystem to initiate transfer of data between the host processing system and the device(s) associated with the data storage subsystem. Read/write data is transferred directly from device to host via a buffer controller. For a read operation, the read command from the host data processing system specifies the data to be transferred and the start address in host memory to which the data should be sent. The device controller of the data storage subsystem is capable of respecifying or amending the start address specified by the host in the rad command. This provides a performance bonefit for split data transfers.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: September 10, 1996
    Assignee: International Business Machines Corporation
    Inventors: Ian D. Judd, Patrick A. Buckland, Roger G. Cath, Gordon J. Cockburn, William A. Short