International Business Machines Corporation

Envirotest Systems Corporation

Kerri Renee Shotwell

Gregory Tad Kishi

James Arthur Fisher

Joseph M Swingler

Lourie A Bryan

Jonathan Wayne Peake

Thomas Holderness Daily

Norie Iwasaki

Richard Albert Welp

Erika Dawson

Nikhil Khandelwal

Stefan Lehmann

Wayne Charles Carlson

Andrew Gary Hourselt

Ricardo Sedillos Padilla

Robin Daniel Roberts

Raymond Anthony James

Louis Daniel Echevarria

Bruce R Kohn

Benjamin S Terris

Steve P Wallace

Rodney T Boorse

Jonathan Douglas Beard

Jason A Ogroski

Theresa M Howard

Nicholas James Pakidis

For maintaining a context stack, a processor monitors a stack size for a stack of a plurality of existing contexts that are not associated to a process of a plurality of processes. Each context is associable and reusable with a plurality of processes and includes a pathway to a data set when not associated to any process of the plurality of processes. The pathway includes a logical volume identifier for the data set, a logical address of the data set within the logical volume, and a logical address of an intervening device. The context defines communications between the process and the data set through the pathway when associated to the process, and each context is returned to the stack when not associated to the process.

Apparatus, system, and method for maintaining a context stack

An apparatus, system, and method are disclosed for maintaining a context stack. A monitor module monitors a stack size after each monitor interval for a stack of a plurality of contexts. Each context defines communications between a process and a data set and comprises a pathway for communicating with the data set and a process identifier. A stack module deallocates a context that satisfies a stack policy from the stack if the stack size is within a buffer threshold of a maximum threshold.

According to one embodiment, a method for handling errors includes detecting that an error has occurred in a machine in a system, determining an error ID associated with the error, determining that the error should be reported to a host system for further analysis based on the error ID, determining that one or more actions should be taken by the system based on the error ID, and sending information corresponding to the error to the host system after it is determined that the error should be reported to the host system. In another embodiment, a system includes a processor and logic for performing the method. According to another embodiment, a computer program product includes a computer readable storage medium having computer readable code embodied therewith for performing the method. Other methods, systems, and computer program products are also described according to more embodiments.

Systems for agile error determination and reporting and methods thereof

A virtual tape server for executing a method involving a partitioning of a virtual tape volume into a plurality of virtual tape blocks. The virtual tape volume includes a virtual tape volume header having recovery information, each virtual tape block includes a virtual tape block header identifying the virtual tape volume and a block sequence number, and one or more of the virtual tape blocks includes the virtual tape volume header. The method further involves a formatting of a physical tape volume including each virtual tape block.

Physical tape interchange format

Methods and apparatus are provided for dynamically compressing categories in a data storage library. In one embodiment, the method includes retrieving an identification of a first category in the data storage library, the first category being a last-compressed category. Next, an identification number of a first order of the first category is retrieved, the first order being a last compressed order. Compression is resumed of orders in the first category with an order next following the first order and continued with additional orders in the first category. If a predetermined amount of time has elapsed, the identification of the first category and the identification number of the order of the first category being compressed are stored. If, however, the predetermined amount of time has not elapsed and compression of the first category is complete, compression of a second category is begun.

Dynamic category compression in a data storage library

A host library controller employs a plurality of ports for establishing a plurality of communication paths from the host library controller to a medium changer library. The host library controller further employs a processor and a memory storing instructions for the processor to issue a command from a medium changer command set, and to select one or more of the ports for communicating the medium changer command to the medium changer library depending on a command processing status of each port.

Method for efficient communication between a host library controller and a medium changer library

To log errors of a plurality of subsystems, a master reporting tool provides a table identifying the subsystems and their interface protocol addresses with respect to a network. A subsystem reports errors, via the network, to the master reporting tool, and the reporting subsystem identifies and reports other subsystems associated with the errors, if any, to the master reporting tool. The master reporting tool employs the interface addresses of the table to request reportable data from the other subsystems identified by the originally reporting subsystem as associated with the reported error. The network may be separate from a data handling network of the data handling system.

Multiple subsystem error reporting

A storage system or subsystem, method of locating components in the storage system and program product therefor. Storage system components have fiducial marks identifying component location. A sensor is located at an expected fiducial location and a first pass search for the fiducial is conducted along a search path. A second pass search, if needed, begins at a position located, horizontally, between the first pass start position and the system accessor home location.

Autonomic fiducial search pattern in an automated tape library

A method to schedule and perform database maintenance, where the database includes information regarding one or more information storage media moveably disposed in a data storage and retrieval system, which includes selecting a first time period, commencing that first time period at a first time and ending that first time period at a third time, performing one or more database queries during that first time period, recording the number of database queries performed during each of the two or more first time intervals, determining the least utilized first time interval where that least utilized first time interval commenced at a second time, calculating a first time difference between the first time and the second time, and scheduling database maintenance at a fourth time. A data storage and retrieval system comprising a computer useable medium having computer readable program code disposed therein to implement Applicants' method to schedule and perform database maintenance. A computer program product usable with a programmable computer processor having computer readable program code embodied therein to implement Applicants' method to schedule and perform database maintenance.

Apparatus and method to schedule and perform database maintenance

Disclosed are a data storage library and library computer processor implemented methods for expiring logical volumes in response to expiration selection from a host. A library server maintains a mapping database which identifies each logical volume and maps the logical volumes to data storage media. A library manager classifies the host selected expired logical volume in a category of logical volumes having a &ldquo;SCRATCH&rdquo; attribute, which may have an expiration delay, and identifies the selected logical volume in a searchable database as comprising the category having the &ldquo;SCRATCH&rdquo; attribute, and may calculate an expiration time for the selected logical volume from the delay. The library manager subsequently searches the searchable database for logical volumes identified as comprising a category having the &ldquo;SCRATCH&rdquo; attribute, and whose expiration time has passed, providing an indication to the library server that the searched identified logical volumes are expired. The library server then expires the identified logical volumes from the mapping database.

Expiring host selected scratch logical volumes in an automated data storage library

A computer system, including a relational database, especially for use by an inspector at a Motor Vehicle Inspection facility, for capturing, storing, retrieving, and displaying visual images disclosing the identification and location of vehicle Emission Control System (ECS) components. A method for systematically creating, updating, and using the relational database is also disclosed. The database is composed of three data libraries, one for ECS Vehicle Underhood Images, one for ECS Component Overlays, and another for ECS Component Lists. These libraries include visual and factual information regarding the identity and location of ECS required components for a plurality of vehicles. The libraries are maintained and used in the database in such a way as to minimize storage space and maximize the speed of data access and display.

Growing community of inventors

Tucson, AZ, United States of America

Kerri Renee Shotwell