Disk drive controller system
May 14, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDynamic disk buffer control unit Magnetic disk-control track read through envelope I/O Storage controller cache system with prefetch determined by requested record's position within data block Disk cache system Control system for interruption long data transfers between a disk unit or disk coche and main memory to execute input/output instructions I/O controller for multiple disparate serial memories with a cache Patent #: 4825357 Inventors
AssigneeApplicationNo. 162948 filed on 02/25/1988US Classes:360/39, GENERAL PROCESSING OF A DIGITAL SIGNAL360/60, Recording-or erasing-prevention360/78.04For rotary carrier (e.g., disc)ExaminersPrimary: Canney, Vincent P.Attorney, Agent or FirmInternational ClassG11B 005/09AbstractA disk drive system includes a disk controller system having separate head positioning and data transfer subsystems and supporting up to four disk drives, two of which may be removable, portable drive units and two of which may connect through a standard ST506 interface. The removable disk drives incorporate a read and write protected data cylinder for storing information such as the maintenance history of the drive, and a read only cylinder for storing a unique serial number as well as other write protected data. The system also features a high capacity, high speed sector buffer which allows continuous transfers of data to or from noninterleaved sectors and supports concurrent disk and system accesses. | |
