Hewlett-packard Development Company, L.P.

Hewlett Packard Enterprise Development LP

Christopher Stroberger

Susan Spence

James Michael Reuter

Rodger Daniels

Suban Krishnamoorthy

Steven J Peters

Charles E Christian, Jr

Michael Padovano

Laura Clemens

Donald R Fraser

Michael G Byrnes

Deborah Levinson

Mirroring of a logical storage unit initially associated with a first controller is performed, where the first log segment associated with the first controller is maintained of writes by the first controller to the logical storage unit. The first log segment is for use in mirroring writes to a mirror system. Control of the logical storage unit is transferred from the first controller to at least a second controller, and in response to the transfer, a first marker is provided in the first log segment to enable the mirror system to synchronize mirrored writes corresponding to writes to the logical storage units by the first controller and at least a second controller.

Performing mirroring of a logical storage unit

In a storage system, at least three storage sites are arranged in a full mirroring relationship using a virtual connection between instances of a storage group on two of the sites whereby no user data is transmitted.

Data mirroring using a virtual connection

A client-server based Storage Area Network (SAN) management system provides easy to use and uniform multiple user interfaces such as web interface and windows interface to the administrators to manage the SAN consisting of various types of devices. The integrated object-oriented management agent consists of several components such as object manager, UI module, web server, user interface modules, error and status handler and device handler. The agent functionality can be dynamically expanded to handle new device types without stopping the existing agent, installing new agent and restarting it. The management system uses conglomerate methods to automatically discover SAN devices and their topology. The error and status from SAN devices are handled in a hybrid method consisting of distributed, hierarchical and centralized schemes. A simple and easy device independent user interface is provided to download firmware to various types of devices hiding complex device dependent processes from the administrator. The system can manage multiple SANs. It can run on various environments such as an appliance, host, in a cluster, or on a client station. Where reliability is required, it can run on a fault tolerant system as well as multiple copies can be run simultaneously.

Modular, dynamically extensible, and integrated storage area network management system

Systems and methods for asynchronous backup of virtual disks in a distributed storage array are disclosed. An exemplary method may comprise receiving an IO stream at the virtual disks in the distributed storage array, writing data to one or more storage cells of the virtual disks in the distributed storage array, and logging completed writes in a first batch for each of the one or more storage cells. The method also comprises establishing a consistency point in the IO stream, terminating logging to the first batch for each of the one or more storage cells at the consistency point and logging completed writes after the consistency point to a new batch for each of the one or more storage cells. The method also comprises transferring writes logged in the first batch to at least one remote storage so that the at least one remote storage is crash consistent.

System and method for asynchronous backup of virtual disks in a distributed storage array

Distributed storage array

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Colorado Springs, CO, United States of America

Christopher Stroberger