Lsi Logic Corporation

Lsi Corporation

Avago Technologies International Sales Pte. Limited

Roger T Clegg

Louis H Odenwald

Timothy E Hoglund

Brian A Day

Craig C McCombs

Luke Everett McKay

Steven R Schremmer

Alan Thomas Pfeifer

William Ortega

Bonnie C Mills

A bridge device tracks each individual IO between two PCIe busses and provides a translated address based on a scatter/gather list. Tracking provides a natural means of scatter/gather list translation to and from a native PCIe storage protocol's scatter/gather list (or other scatter/gather like mechanism). In addition, the awareness of the IO context provides a means for detecting erroneous transactions that would otherwise cause a system error and/or data corruption to be aborted preventing those error scenarios.

Per IO direct memory access redirection

Apparatus and methods for enabling multiple, unidirectional, virtual connections between a first SAS device and multiple other SAS devices in a SAS domain. An enhanced first SAS device may be substantially simultaneously coupled to each of two other SAS devices through one or more appropriately enhanced SAS expanders to allow substantially simultaneous unidirectional virtual connections from the first SAS device to both of the second and third SAS devices. Each virtual connection is, in essence, a half-duplex connection such that the first device is transmitting information to a second SAS device substantially simultaneous with the first device receiving information from a third SAS device. The enhancements are provided in a manner to allow backward compatibility with current SAS specifications for connectivity among devices not suitably enhanced in accordance with features and aspects hereof (e.g., with legacy devices).

Apparatus and methods for multiple unidirectional virtual connections among SAS devices

A method and apparatus for generating a system specific test by providing sophisticated error tracking mechanisms to trigger on a specific system event. The present invention addresses the problem of monitoring network traffic and isolating a point of error at the testing stage. The present invention defines a specific system event to be monitored. A trigger is created in the host system and routed to the analyzer, wherein the trigger is used to allow the analyzer to capture information related to the specific system event. When a signal is received at the analyzer, the signal automatically triggers the analyzer to capture and store a predetermined amount of data related to the specific system event before and after the trigger is executed.

Method to provide external observability when embedded firmware detects predefined conditions

The present invention is directed to a configurable input/output interface and method for data transfer between a host and a target in a network environment. A method for providing data transfer between a host and a target in a network environment by a configurable input/output interface includes providing a logical identifier. The logical identifier is configurable for operation in at least two modes, the at least two modes including at least two of referencing multiple data transfer routes between the target and the input/output device utilizing a single logical identifier, referencing a single route between the target and the input/output device utilizing a logical identifier, and referencing a physical address of the target utilizing a logical identifier. Communications between the host and the target are managed by selecting a mode of the at least two modes operable by the input/output interface.

Selectable logical identifier mapping

The present invention is directed to a system and method employing a static logical identifier. In an aspect of the present invention, an input/output interface suitable for communicatively coupling a host with a target device may include at least one port communicatively coupling the input/output interface with a host and at least one port communicatively coupling the input/output interface with a target. A controller is communicatively coupled to the ports. When the controller receives an identifier from the host, the controller generates a logical identifier from the identifier, the logical identifier suitable for being utilized in conjunction with a look-up table to provide access to the target.

System and method employing a static logical identifier in conjuction with a look up table to provide access to a target

A reading algorithm for a set of mirrored disks sends groups of reads to one disk, then sends the next group to the other disk. This provides a more optimal use of disks for sequential reads than previous algorithms. An enhanced version uses snooping of the read requests and switches disks immediately for the read if the requests are not sequential, or within a given number of records of sequential. Additionally, the size of the requests can change the number of requests grouped together in the enhanced version.

Algorithm for maintaining maximum streaming performance of mirrored disks

A circuit comprising a processor and a translation circuit. The processor may be configured to present a first address. The translation circuit may be configured to (i) determine a mask and an offset, (ii) mask the first address to produce a first masked address, (iii) mask a second address to produce a second masked address, (iv) compare the first masked address with the second masked address, and (v) add the offset to the first address to present a third address in response to the first masked address being at least as great as the second masked address.

Growing community of inventors

Wichita, KS, United States of America

Roger T Clegg