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公开(公告)号：DE69118747D1
公开(公告)日：1996-05-23
申请号：DE69118747
申请日：1991-05-20
Applicant: IBM
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Patent Agency Ranking
公开(公告)号：DE69127025T2
公开(公告)日：1998-02-12
申请号：DE69127025
申请日：1991-05-20
Applicant: IBM
Inventor： MONAHAN CHRISTOPHER JOHN , MONAHAN MARY LINDA , WILLSON DENNIS LEE
Abstract: An error detecting and recovery subsystem which can be easily modified for use with any data processing system which is being monitored is disclosed. The subsystem employs a user editable file including the rules for defining the system state, the error states, and the sequences of recovery actions to be taken depending upon the comparison between the system state and the error states. The rules for defining the system state, include means for determining selected system variables, and the sequences of recovery actions are specified using an index into a set of elemental recovery actions. Because the system state, error state, and sequence of recovery actions are defined in a user editable file, modifications to the error detection and recovery scheme can be made without recompiling the recovery subsystem program code. Such modifications to the subsystem may therefore be made on a real time basis.
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公开(公告)号：DE69118747T2
公开(公告)日：1996-11-14
申请号：DE69118747
申请日：1991-05-20
Applicant: IBM
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公开(公告)号：DE69127025D1
公开(公告)日：1997-09-04
申请号：DE69127025
申请日：1991-05-20
Applicant: IBM
Inventor： MONAHAN CHRISTOPHER JOHN , MONAHAN MARY LINDA , WILLSON DENNIS LEE
Abstract: An error detecting and recovery subsystem which can be easily modified for use with any data processing system which is being monitored is disclosed. The subsystem employs a user editable file including the rules for defining the system state, the error states, and the sequences of recovery actions to be taken depending upon the comparison between the system state and the error states. The rules for defining the system state, include means for determining selected system variables, and the sequences of recovery actions are specified using an index into a set of elemental recovery actions. Because the system state, error state, and sequence of recovery actions are defined in a user editable file, modifications to the error detection and recovery scheme can be made without recompiling the recovery subsystem program code. Such modifications to the subsystem may therefore be made on a real time basis.
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公开(公告)号：CA2039364C
公开(公告)日：1995-08-29
申请号：CA2039364
申请日：1991-03-28
Applicant: IBM
Inventor： HARTUNG JOSEPH CHARLES , MONAHAN CHRISTOPHER JOHN , THRALL JESSE LEE , WILLSON DENNIS LEE , WINARSKI DANIEL JAMES
Abstract: A method for selecting data storage media for demount in an automated storage library, and an automated storage library and program product therefor are disclosed. Preemptive demount of storage media is permitted when all peripheral storage devices in the library are occupied and one or more of such devices remains inactive for a predetermined time. Storage media may be demounted to service existing mount requests, provided the peripheral storage devices in which the media are mounted are inactive. There is also a need, however, to ensure the availability of an empty device to service future mount requests, particularly in libraries having only a single gripper mechanism. Thus, even when no mount requests are pending, the status of the peripheral storage devices is continually monitored. If the peripheral storage devices are all occupied, and one or more of such devices remains inactive for the predetermined time, the least recently used storage medium is demounted and transferred to a storage cell in the library.
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