G - Physics – 11 – B
Patent
G - Physics
11
B
352/19.4
G11B 5/09 (2006.01) G06F 3/06 (2006.01)
Patent
CA 1120585
ABSTRACT OF THE DISCLOSURE A drive for a secondary storage facility that includes a controller and a drive bus that interconnects the controller and drive. Data is transferred between the drive and controller in serial fashion over a read/write data line. Control information, in the form of control mes- sages, is transferred between the drive and the controller in serial fash- ion over two message lines of the drive bus. A message transfer is initiat- ed by a strobing pulse from the controller and is controlled in response to clocking signals from the controller. During a transfer of a message to the drive, a controller-to-drive signal is asserted and conveyed to the drive. When the message has been completed, the controller-to-drive signal shifts to a non-asserted state and enables the drive to transmit back to the controller a status message under the control of clocking signals gen- erated in the drive in response to the clocking signals from the controller that are returned to the controller over the strobing signal line.
300913
Digital Equipment Corporation
Smart & Biggar
LandOfFree
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