International Business Machines Corporation

Kevin L Scheiern

Don S Keener

Andrew B McNeill

William Carleton Wimer, Ii

Lauren L Bader

James F Schenck

Julia V Myers

Thomas H Newsom

Edward I Wachtel

Richard W Voorhees

Embodiments of the present invention address deficiencies of the art in respect to application data logging and provide a novel and non-obvious method, system and computer program product for capturing and logging application data. In an embodiment of the invention, a method for capturing and logging application data can include consulting both administrative permissions for capturing and logging application data, and also user permissions for capturing and logging application data. Subsequently, application data can be captured and logged only if permitted by the administrative permissions and the user permissions. In this regard, it can be determined from either or both of the permissions whether capturing and logging of application data is permitted generally, and also a type or portion of the application data that is permitted to be captured and logged.

Dynamic dual permissions-based data capturing and logging

Dynamical dual permissions-based data capturing and logging

Arrangements for physically partitioning a bus having a well defined architecture as a physical entity, wherein the partitioning is logically transparent to a computer and devices which communicate through the bus and serves to avoid problems potentially arising because of the scope of actions permitted by the architecture. A typical bus architecture to which present arrangements have relevance is that associated with SCSI (Small Computer System Interface) buses. The potential problems allowed to occur architecturally involve: (a) exposures of data security/integrity; (b) excessive signal degradation due to use of signal rates which although allowed by the architecture are inappropriate for a particular bus loading environment also allowed by the architecture; (c) restrictions preventing parallel transfer of data between the computer and multiple storage devices; (d) restrictions unduly limiting the number of devices attachable to one logical bus path (one input-output channel of the computer). The disclosed arrangement partitions the bus into two or more physical entities which to the computer appears as one logical entity.

Physical partitioning of logically continuous bus

On board diagnostic capability for a SCSI controller is provided within an adapter by providing a gate array driven by a microprocessor on board the adapter. The gate array has data and control inputs driven from the microprocessor and data and control outputs which are dot OR'ed with corresponding in/out terminals of the SCSI controller. A reset signal from a SCSI bus forms a further input to the gate array. For testing purposes the microprocessor drives the gate array inputs to simulate a fault-free or faulty device. The microprocessor detects the response of the SCSI controller to the device simulation and thereby can determine the state of health of the SCSI controller.

On-board diagnostic sub-system for SCSI interface

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Cary, NC, United States of America

Kevin L Scheiern