International Business Machines Corporation

Dale Francis Riedy, Jr

Harry M Yudenfriend

Matthew J Kalos

Scott Brady Compton

John R Flanagan

Daniel Francis Casper

Scott M Carlson

Susan Kay Candelaria

William J Rooney

Gustav E Sittmann, Iii

Catherine C Huang

Ugochukwu Charles Njoku

Roger Gregory Hathorn

Peter Grimm Sutton

Kenneth J Oakes

David F Craddock

Leslie W Wyman

Tan Lu

John Richard Paveza

John S Trotter

Beth A Glendening

Greg A Dyck

Beth Ann Peterson

Louis William Ricci

Richard Anthony Ripberger

Craig Donald Norberg

Gregory E McBride

Clint Alan Hardy

Peter Bergersen Yocom

Stephen Robert Guendert

Deborah A Furman

Ilene A Goldman

Matthew Richard Craig

Mark P Bendyk

Mariann Devine

Carol Santich Mellgren

Anthony Thomas Sofia

David Michael Shackelford

Patricia G Driever

David Randall Blea

Tabor R Powelson

Ronald E Bretschneider

Gustav E Sittmann

Donald W Schmidt

Charles W Gainey, Jr

Mark S Farrell

Theresa Mary Brown

Jeffrey Paul Kubala

Alan Frederic Benner

Christopher J Colonna

Marco Kraemer

Frank William Brice

Charles E Shapley

Brad D Stilwell

Michael J Shannon

Matthew Hank Sabins

Geoffrey E Miller

Tracy D Butler

Marisa Freidhof

Ugochukwu Njoku-Charles

Juan A Coronado

David Harold Surman

Nicolas Marc Clayton

Janet R Easton

Eugene P Hefferon

Marten J Halma

Chung Man Fung

Carol B Hernandez

Wayne Erwin Rhoten

Brian S Lee

Hans-Helge Lehmann

Barbara J Bryant

William C Shepard

Francis Gassert

John F Betz

Tri M Hoang

Kenneth M Trowell

James B Cammarata

Stephen M Kocik

Providing fine granularity read access to generational copies of safeguarded copy data. In some instances, a fine granularity read access to generational copies of safeguarded copy data includes the ability to use a generation ID to determine the exact generation copy that contains relevant enterprise related data that must be recovered and/or utilized. Additionally, the fine granularity read access is done in a manner that does not require a restore of the relevant enterprise related data to a recovery volume and that does not compromise other generation copies.

Fine granularity read access to generational safeguarded copy data

Ensuring that enterprise data that has potentially become corrupted is recoverable and usable by creating safeguarded copy volumes of the enterprise data. One important aspect of any corruption detection scheme is to determine when the data has become corrupted and locate the last known uncorrupted copy of the data as quickly as possible. Once this set of data is identified, the restoration process can begin with that data, and subsequent logged transactions can be reapplied if possible, which brings the data to the most recent and uncorrupted version.

Generational access to safeguarded copy source volumes

Provided are a computer program product, system, and method for processing request directed through a channel subsystem to a storage server. In one embodiment, a pattern search request is embedded in a Device Command Word (DCW) which allows the storage server to do all or substantially all of the search and comparison work in response to as few as a single DCW from the host. In addition, I/O processing can be enhanced to use the target record of interest of a successful embedded pattern search request as the starting point for read/write I/O processing, all in response to as few as a single DCW. Still further, orientation rules can also be relaxed such that once a target record is found, any and all fields of the record can be accessed and utilized in execution of subsequent commands of the initial or subsequent DCWs of the chain.

Pattern search request embedded in a transport mode command word for a channel subsystem in a storage system

A host is configured to communicate with a storage controller over a first storage area network. A request is transmitted from the host to the storage controller to provide read diagnostic parameters of a second storage area network that is used to mirror data controlled by the storage controller to another storage controller. The host receives the read diagnostic parameters of the second storage area network from the storage controller.

Generation of host requests to a storage controller for read diagnostic parameters for a data mirroring configuration

A port descriptor version of a port descriptor to be obtained is selected. An indication of the port descriptor version is provided in a command to be preceded before another command used to obtain the port descriptor. The other command uses the port descriptor version to obtain the port descriptor. The port descriptor is obtained, and the port descriptor includes information relating to a port to be used in communication within the computing environment.

Commands to select a port descriptor of a specific version

A port descriptor of a selected port descriptor version is obtained. The selected port descriptor version is one port descriptor version of a plurality of port descriptor versions available for selection. The port descriptor of the selected port descriptor version includes information relating to a port of the computing environment and is configured to include technology information indicating whether the port is part of a multiple lane connector packaging. A determination is made using the port descriptor of one or more operational attributes of the port. Action is taken based on the one or more operational attributes of the port.

Port descriptor configured for technological modifications

A set command is issued to transfer a diagnostic parameter record to a communication component of the computing environment. The diagnostic parameter record specifies a diagnostic action to be taken by the communication component to obtain diagnostic information and specifies a version of the diagnostic information to be obtained. Based, in part, on issuing the set command, the diagnostic information is obtained. The version of the diagnostic information obtained is the version specified, based on the version specified being supported by the communication component.

Set diagnostic parameters command

Embodiments of dynamically increasing the resources for a partition to compensate for an input/output (I/O) recovery event are provided. An aspect includes allocating a first set of resources to a partition that is hosted on a data processing system. Another aspect includes operating the partition on the data processing system using the first set of resources. Another aspect includes, based on detection of an input/output (I/O) recovery event associated with operation of the partition, determining a compensation for the I/O recovery event. Another aspect includes allocating a second set of resources in addition to the first set of resources to the partition, the second set of resources corresponding to the compensation for the I/O recovery event. Another aspect includes operating the partition on the data processing system using the first set of resources and the second set of resources.

Increasing resources for partition to compensate for input/output (I/O) recovery event

A read command is issued to initiate a transfer of diagnostic information from a communication component of the computing environment. Based on issuing the read command, the diagnostic information is obtained from the communication component. The diagnostic information is configured based on a version of diagnostic information requested. The version is one version of a plurality of versions to be supported by the communication component. The diagnostic information includes diagnostic information relating to one or more communication components of the computing environment and to be used to facilitate communication within the computing environment.

Read diagnostic information command

Provided is a method for correcting untrusted data and avoiding logical device swapping for at least one logical subsystem of at least one computer system. A processor may monitor a primary storage for one or more errors that indicate untrusted data on the primary storage. An error indicating that a data set on the primary storage is an untrusted data set may be identified. In response to the error being identified, a corresponding uncompromised version of the data set may be read from a secondary storage. The corresponding uncompromised version of the data set may be written over the untrusted data set on the primary storage.

Automatic data healing by I/O

A storage controller is configured to communicate with a host over a first storage area network. Data controlled via the storage controller is mirrored to another storage controller over a second storage area network. The storage controller receives a request from the host to provide read diagnostic parameters of the second storage area network. In response to receiving the request, the storage controller secures the read diagnostic parameters of the second storage area network. The storage controller transmits the read diagnostic parameters of the second storage area network to the host.

Communication of diagnostic parameters of a data mirroring configuration from a storage controller to a host

A method for accelerating transaction execution across geographically dispersed clusters is disclosed. In one embodiment, such a method includes receiving a request to read data in a data replication system comprising a primary storage system and a secondary storage system in a synchronous mirroring relationship with the primary storage system. The method determines whether at least one of the following conditions is true: (1) the secondary storage system is closer from a communication standpoint; and (2) a high speed communication technology is available to communicate with the secondary storage system that is not available to communicate with the primary storage system. In the event either of the conditions is true, the method directs the request to the secondary storage system. In the event neither of the conditions is true, the method directs the request to the primary storage system. A corresponding system and computer program product are also disclosed.

Accelerating transaction execution across geographically dispersed clusters

Growing community of inventors

Poughkeepsie, NY, United States of America

Dale Francis Riedy, Jr