International Business Machines Corporation

Other

Enrique Q Garcia

Todd Charles Sorenson

Gary William Batchelor

Larry Juarez

John Charles Elliott

Trung Ngoc Nguyen

Yolanda Colpo

Jay T Kirch

Brian Anthony Rinaldi

Gregg Steven Lucas

Ronald David Martens

Juan Antonio Yanes

Veronica S Davila

Yvonne Hanson

Herve G P Andre

Robin Han

Matthew D Carson

Mark Elliott Hack

Tony Leung

Ricardo Sedillos Padilla

Yvonne Hanson Kleppel

Matthew J Kalos

Michael T Benhase

Carl Evan Jones

Brian James Cagno

Adalberto Guillermo Yanes

Thomas Charles Jarvis

Micah Robison

Stephen LaRoux Blinick

Louis Alonso Rasor

Scott A Brewer

Robert Earl Medlin

Sushama M Paranjape

Trung Le

David Brent Schreiber

Earle Ellsworth

Kenny N Qiu

Sangram Singh Ghoman

Russell Lee Ellison

James Richard Pollock

Henry E Garcia

Lisa Phan

Ralph O'Neill

Laura Hepner Evans

Adolfo Nava Garcia

Rajendrasinh Banesinh Jadeja

Rony Lemus

Daniel I Ibanez

A method is disclosed for maintaining a current operating state of an enclosure when a controller card of the enclosure is repaired and/or replaced. In one embodiment, such a method maintains, within a controller card of an enclosure, operating parameters used to establish an operating state of the enclosure. The method further offloads, from the controller card while the controller card is installed in the enclosure, the operating parameters to a location external to the controller card. Upon removal of the controller card from the enclosure, the method maintains the operating state of the enclosure using the operating parameters stored in the external location. Upon reinstalling the controller card in the enclosure, the method optionally retrieves the operating parameters from the external location and initializes the controller card with the operating parameters. A corresponding system and computer program product are also disclosed.

Non-disruptive repair of enclosure controller components

Provided are techniques for concurrent Input/Output (I/O) enclosure firmware/Field-Programmable Gate Array (FPGA) update in a multi-node environment. First notifications are sent to each I/O enclosure management engine on each of a plurality of server nodes that code activation for a first set of I/O enclosures is starting. An update image is distributed to the first set of I/O enclosures. The update image on the first set of I/O enclosures is activated by sending an activate reset command to each of the first set of I/O enclosures, wherein a reset is not propagated to other devices within each I/O enclosure in the first set of I/O enclosures in response to determining that the reset is an activate reset. In response to the activate reset command completing, second notifications are sent to each I/O enclosure management engine that code activation for the first set of I/O enclosures has completed.

Concurrent I/O enclosure firmware/field-programmable gate array (FPGA) update in a multi-node environment

Provided are techniques for detecting a type of storage adapter connected to an Input/Output (I/O) bay and miscabling of a microbay housing the storage adapter. Under control of an Input/Ouput (I/O) bay, cable sidebands are driven high for a predetermined period of time. It is determined whether a cable sidebands response has been detected that indicates that the cable sidebands have been driven low. In response to determining that the cable sidebands response has been detected, it is determined that the I/O bay is connected to a first storage adapter supporting a first protocol for the cable sidebands. In response to determining that the cable sidebands response has not been detected, it is determined that the I/O bay is connected to a second storage adapter supporting a second protocol for the cable sidebands. Moreover, I/O bay and port numbers stored by the microbay are used to determine miscabling.

Detecting a type of storage adapter connected and miscabling of a microbay housing the storage adapter

In accordance with one aspect of the present description, a node of the distributed computing system has multiple communication paths to a data processing resource lock which controls access to shared resources, for example. In this manner, at least one redundant communication path is provided between a node and a data processing resource lock to facilitate reliable transmission of data processing resource lock signals between the node and the data processing resource lock. Other features and aspects may be realized, depending upon the particular application.

Data processing lock signal transmission

In one aspect, multiple data path error collection is provided in a storage management system. In one embodiment, an error condition in a main data path between the storage controller and at least one of a host and a storage unit is detected, and in response, a sequence of error data collection operations to collect error data through a main path is initiated. In response to a failure to collect error data at a level of the sequential error data collection operations, error data is collected through an alternate data path as a function of the error data collection level at which the failure occurred. Other aspects are described.

Multiple path error data collection in a storage management system

A dolly for transporting doors and planks of different types using a spring loaded hinge assemblywith two arm holding assemblies, each mounted to a hinge leaf. The dolly is removably mounted at a predetermined location along the edge of the transported object. The frictional force exerted by the arm holding assemblies against the object keeps the dolly mounted to the latter. A wheel assembly is mounted to the arm holding assemblies.

Removable dolly

Provided are a computer program product, system, and method for embedding and executing trace functions in code to gather trace data. A plurality of trace functions are embedded in the code. For each embedded trace function, a trace level is included indicating code to which the trace applies. The trace level comprises one of a plurality of levels. During the execution of the code, the embedded trace functions having one of the levels associated with a specified at least one level specified are executed. The embedded trace functions associated with at least one level not comprising one of the at least one specified level are not invoked.

Embedding and executing trace functions in code to gather trace data

Efficient logging in a control system is provided. A temporary history record corresponding to a message transaction placed onto a message queue data structure is generated. A total processing time for the received message transaction is determined. The total processing time is compared with a previously determined peak processing time value. In response to determining that the total processing time exceeds the previously determined peak processing time value, the temporary history record corresponding to the received message transaction is stored in an event log.

Efficient logging of processing peaks in control systems

Efficient logging in a control system. Register update requests to store data values in one or more of a plurality of primary registers are received. The most frequently updated primary registers of the plurality of primary registers are periodically identifying. A shadow register is associated with each of the identified most frequently updated primary registers. In response to receiving a register update request to store a data value in one of the most frequently updated primary registers, it is determined if the data value to store is different than the data value stored in the shadow register associated with the register to update. If so, the data value to store is stored into the register to update, stored into the shadow register associated with the register to update, and a log entry corresponding to the register update request is stored in an event log file.

Filtering event log entries

A storage controller determines a presence of an indication from an Input/Output (I/O) enclosure that the I/O enclosure will be powered off after a predetermined amount of time. The storage controller quiesces all I/O adapters of the I/O enclosure, in response to receiving the indication. The storage controller quiesces the I/O enclosure, in response to completion of quiescing of all of the I/O adapters of the I/O enclosure.

Method, system, and computer program product for taking an I/O enclosure offline

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Tucson, AZ, United States of America

Enrique Q Garcia