公开(公告)号：GB2365589B

公开(公告)日：2004-11-24

申请号：GB0103673

申请日：2001-02-15

Applicant: IBM

Inventor： GLASSEN STEVEN ,  HALMA MARTEN J ,  HEFFERON EUGENE P ,  MERITT ALLAN S ,  OAKES KENNETH J ,  YUDENFRIEND HARRY M

IPC: G06F11/34

公开(公告)号：CA1299757C

公开(公告)日：1992-04-28

申请号：CA570926

申请日：1988-06-30

Applicant: IBM

Inventor： BEARDSLEY BRENT C ,  HEFFERON EUGENE P ,  LYNCH KENNETH R ,  SHIPMAN LLOYD R

IPC: G06F11/14 ,  G06F11/20 ,  G06F13/00 ,  G06F13/14 ,  G06F15/16 ,  G06F15/177 ,  G06F11/00

Abstract: A data processing system includes a plurality of host systems and peripheral subsystems, particularly data storage subsystems. Each of the data storage subsystems includes a plurality of control units attaching a plurality of data storage devices such as direct access storage devices (DASD) for storing data on behalf of the various host systems. Each of the control units have a separate storage path for accessing the peripheral data storage devices using dynamic pathing. The storage paths can be clustered into power clusters. Maintenance personnel acting through maintenance panels on either the control units or the peripheral data storage devices activate the subsystem to request reconfiguration of the subsystem from all of the host systems connected to the subsystem. The host systems can honor the request or reject it based upon diverse criteria. Upon each of the host systems approving the reconfiguration, the subsystem is reconfigured for maintenance purposes. Upon completion of the maintenance procedures, a second reconfiguration request is sent to the host systems for causing quiesce devices to resume normal operations. TU986011

公开(公告)号：CA2068805C

公开(公告)日：1996-09-17

申请号：CA2068805

申请日：1992-05-15

Applicant: IBM

Inventor： BROWN PAUL J ,  FREDERICKS KENNETH J SR ,  HEFFERON EUGENE P ,  MOFFITT GERALD T ,  MERITT ALLAN S

IPC: G06F13/14 ,  G06F13/00 ,  H04L29/00 ,  G06F9/00 ,  G06F12/00

Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.

公开(公告)号：GB2365589A

公开(公告)日：2002-02-20

申请号：GB0103673

申请日：2001-02-15

Applicant: IBM

Inventor： GLASSEN STEVEN ,  HALMA MARTEN J ,  HEFFERON EUGENE P ,  MERITT ALLAN S ,  OAKES KENNETH J ,  YUDENFRIEND HARRY M

IPC: G06F11/34

Abstract: The utilisation of various individual components of a channel is determined in order to learn which portion of a channel is busy and to what extent that portion is busy. The determination of a component's utilisation is dependent on the type of component, as well as the operational characteristics of that component.

公开(公告)号：CA2068805A1

公开(公告)日：1993-02-28

申请号：CA2068805

申请日：1992-05-15

Applicant: IBM

Inventor： BROWN PAUL J ,  FREDERICKS KENNETH J SR ,  HEFFERON EUGENE P ,  MOFFITT GERALD T ,  MERITT ALLAN S

IPC: G06F13/14 ,  G06F13/00 ,  H04L29/00 ,  G06F12/00 ,  G06F9/00

Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.