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公开(公告)号：DE69123104T2
公开(公告)日：1997-04-30
申请号：DE69123104
申请日：1991-06-17
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , ELLIOTT JOSEPH CHARLES , HOPPE KARL HELMUTH , LYNCH KENNETH ROBERT , SACHS MARTIN WILLIAM
Abstract: A computer I/O system which includes a dynamic switch (10) having a plurality of ports (P) and a plurality of link-level facilities, with each link-level facility being attached to an individual one of the ports (P). Whenever the state of a port (P) 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 (20) 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.
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公开(公告)号：DE69122013T2
公开(公告)日：1997-03-13
申请号：DE69122013
申请日：1991-06-18
Applicant: IBM
Inventor： ELLIOTT JOSEPH CHARLES , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , SACHS MARTIN WILLIAM , SNEDAKER MARK CARL
Abstract: In a computer I/O system including a plurality of link-level facilities and a dynamic switch (10) having a plurality of ports (P), each link-level facility being attached to an individual one of the ports (P), a mechanism and method for assigning a unique link level address to each of the link-level facilities. As each of the link-level facilities comes on line, it sends an acquire link address (ALA) frame and waits for a response (ACK) frame. The ALA frame may be addressed to a general to-whom-it-may-concern address and have a source address of who-am-I. Only a dynamic switch (10) normally assigns link addresses. When receiving (110) an ALA frame, the dynamic switch returns (115) an ACK frame having a unique link address assigned to the sender of the ALA frame. Provision is made for determining if there is a dynamic switch present, or, if the link-level facilities are connected together by a static connection through the dynamic switch, for the link-level facility of a channel to assign the unique link addresses.
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公开(公告)号：DE69027399T2
公开(公告)日：1996-12-05
申请号：DE69027399
申请日：1990-08-13
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , ELLIOTT JOSEPH CHARLES , FRANASZEK PETER ANTHONY , HOPPE KARL HELMUTH , LYNCH KENNETH ROBERT , SACHS MARTIN WILLIAM , SKARSHINSKI LEON
IPC: H04L12/56
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公开(公告)号：DE69027399D1
公开(公告)日：1996-07-18
申请号：DE69027399
申请日：1990-08-13
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , ELLIOTT JOSEPH CHARLES , FRANASZEK PETER ANTHONY , HOPPE KARL HELMUTH , LYNCH KENNETH ROBERT , SACHS MARTIN WILLIAM , SKARSHINSKI LEON
IPC: H04L12/56
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公开(公告)号：AT139395T
公开(公告)日：1996-06-15
申请号：AT90115515
申请日：1990-08-13
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , ELLIOTT JOSEPH CHARLES , FRANASZEK PETER ANTHONY , HOPPE KARL HELMUTH , LYNCH KENNETH ROBERT , SACHS MARTIN WILLIAM , SKARSHINSKI LEON
IPC: H04L12/56
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Patent Agency Ranking
公开(公告)号：DE69122930T2
公开(公告)日：1997-05-07
申请号：DE69122930
申请日：1991-07-09
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , KALOS MATTHEW JOSEPH , SACHS MARTIN WILLIAM
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公开(公告)号：DE69122013D1
公开(公告)日：1996-10-17
申请号：DE69122013
申请日：1991-06-18
Applicant: IBM
Inventor： ELLIOTT JOSEPH CHARLES , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , SACHS MARTIN WILLIAM , SNEDAKER MARK CARL
Abstract: In a computer I/O system including a plurality of link-level facilities and a dynamic switch (10) having a plurality of ports (P), each link-level facility being attached to an individual one of the ports (P), a mechanism and method for assigning a unique link level address to each of the link-level facilities. As each of the link-level facilities comes on line, it sends an acquire link address (ALA) frame and waits for a response (ACK) frame. The ALA frame may be addressed to a general to-whom-it-may-concern address and have a source address of who-am-I. Only a dynamic switch (10) normally assigns link addresses. When receiving (110) an ALA frame, the dynamic switch returns (115) an ACK frame having a unique link address assigned to the sender of the ALA frame. Provision is made for determining if there is a dynamic switch present, or, if the link-level facilities are connected together by a static connection through the dynamic switch, for the link-level facility of a channel to assign the unique link addresses.
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公开(公告)号：DE69312589T2
公开(公告)日：1998-02-19
申请号：DE69312589
申请日：1993-05-07
Applicant: IBM
Inventor： BRICE FRANK WILLIAM , ELLIOTT JOSEPH CHARLES , FREDERICKS KENNETH JAMES , GALBRAITH ROBERT EDWARD , HALMA MARTEN JAN , HOUGH ROGER ELDRED , JOHN SUZANNE MARIE , MALINOWSKI PAUL ANTHONY , MERITT ALLAN SAMUEL , OAKES KENNETH JAMES , RATHJEN JOHN CORD , SACHS MARTIN WILLIAM , STUCKI DAVID EMMETT , WYMAN LESLIE WOOD
Abstract: Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.
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公开(公告)号：DE69312589D1
公开(公告)日：1997-09-04
申请号：DE69312589
申请日：1993-05-07
Applicant: IBM
Inventor： BRICE FRANK WILLIAM , ELLIOTT JOSEPH CHARLES , FREDERICKS KENNETH JAMES , GALBRAITH ROBERT EDWARD , HALMA MARTEN JAN , HOUGH ROGER ELDRED , JOHN SUZANNE MARIE , MALINOWSKI PAUL ANTHONY , MERITT ALLAN SAMUEL , OAKES KENNETH JAMES , RATHJEN JOHN CORD , SACHS MARTIN WILLIAM , STUCKI DAVID EMMETT , WYMAN LESLIE WOOD
Abstract: Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.
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公开(公告)号：DE69123104D1
公开(公告)日：1996-12-19
申请号：DE69123104
申请日：1991-06-17
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , ELLIOTT JOSEPH CHARLES , HOPPE KARL HELMUTH , LYNCH KENNETH ROBERT , SACHS MARTIN WILLIAM
Abstract: A computer I/O system which includes a dynamic switch (10) having a plurality of ports (P) and a plurality of link-level facilities, with each link-level facility being attached to an individual one of the ports (P). Whenever the state of a port (P) 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 (20) 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.
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