Karl H Hoppe

US Patent:

52972623, Mar 22, 1994

Filed:

Oct 21, 1992

Appl. No.:

7/964571

Inventors:

Michael C. Cox - Saugerties NY
Richard Cwiakala - Wappingers Falls NY
Jean-Louis Fava - Montpellier, FR
Gary A. Fisher - Port Ewen NY
Robert J. Gallagher - Hurley NY
Eugene P. Hefferon - Poughkeepsie NY
Karl H. Hoppe - Ulster Park NY
Peter I. Kania - Poughkeepsie NY
Martin W. Sachs - Westport CT

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1300

US Classification:

395325

Abstract:

A computer system, including at least one host (processor and operating system), a channel subsystem and at least one switch (together with an associated switch controller) for switchably connecting an I/O device (together with an associated I/O device control unit) to a host via said channel subsystem, in combination with means for dynamically managing I/O connectivity in said computer from each host. The I/O manager's functions are centralized at the host level across the computer system. Each host is responsible for an instance of the manager. According to the preferred embodiment of the invention the computer system, I/O manager combination includes: (a) first means, located within each switch, for providing direct host access to the switch controller associated with a given switch; (b) second means, included in each host level instance of the manager, for automatically and dynamically determining the current I/O configuration and connectivity of each host; (c) third means, included in each host level instance of the manager, for performing System Integrated Switching (i. e. , switching where any instance of the I/O manager can veto a proposed configuration change) and (d) fourth means, included in each host level instance of the manager, for insuring the integrity of the I/O connectivity database, through the use of an interlock mechanism, in a multiuser environment where each user can enter multiple part commands and processes concurrently.

US Patent:

54230063, Jun 6, 1995

Filed:

Jun 30, 1993

Appl. No.:

8/086390

Inventors:

Paul J. Brown - Poughkeepsie NY
Joseph C. Elliott - Hopewell Junction NY
Karl H. Hoppe - Ulster Park NY
Kenneth R. Lynch - Rhinebeck NY
Martin W. Sachs - Westport CT

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04J 324

US Classification:

395275

Abstract:

A computer I/O system which includes a dynamic switch having a plurality of ports and a plurality of link-level facilities, with each link-level facility being attached to an individual one of the ports. Whenever the state of a port or its attached link-level facility is changed in such a way that the attached link-level facility's ability to communicate with another link-level facility might be affected, this fact is recognized by a dynamic switch control unit which causes a state change notification (SCN) frame to be transmitted to all other link-level facilities which might be affected. The link-level facilities receiving such a state change notification then determine if any of the associations or potential associations with the link-level facility which caused the state change notification are affected.

US Patent:

53966368, Mar 7, 1995

Filed:

Oct 21, 1991

Appl. No.:

7/779690

Inventors:

Robert J. Gallagher - Hurley NY
Karl H. Hoppe - Ulster Park NY
Anthony J. Perri - Staatsburg NY
Mark S. Styduhar - Germantown NY
Jordan M. Taylor - Poughkeepsie NY
Bert W. Weidle - Ulster Park NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1100

US Classification:

395750

Abstract:

An inexpensive and low power consumption power control unit that does not require a separate interface or network. In the power off state only a detector and a power controller require power, this power is supplied from a power source. Upon detection of traffic a frame decoder is powered up to receive frames. When the link is quiet, the decoder is powered down while the power controller and receiver remain powered and await further traffic.

US Patent:

51074893, Apr 21, 1992

Filed:

Oct 30, 1989

Appl. No.:

7/429267

Inventors:

Paul J. Brown - Poughkeepsie NY
Joseph C. Elliott - Hopewell Junction NY
Peter A. Franaszek - Katonah NY
Karl H. Hoppe - Ulster Park NY
Kenneth R. Lynch - Rhinebeck NY
Martin W. Sachs - Westport CT
Leon Skarshinski - Red Hook NY

International Classification:

H04J 314

US Classification:

370 582

Abstract:

A dynamic switch and its protocol for establishing dynamic connections in a link by the use of frames, each frame having an identification of the source of the frame, an identification of the destination of the frame for the requested connection, and link controls to maintain, initiate or terminate a connection between the source and the destination. The frames are bounded by a start of frame delimiter and an end of frame delimiter which may also act as a connect link control and a disconnect link control, respectively, and the connections are made through the dynamic switch having dynamic-switch ports. The state of a dynamic-switch port is changed dependent on its present state, the dynamic connection requested, and the direction and type of frames passing through the dynamic-switch port.