Lsi Corporation

Guolin Huang

James A Rizzo

Vinu Velayudhan

Sumant Kumar Patro

Basavaraj Gurupadappa Hallyal

Adam Weiner

Rakesh Chandra

Methods and structure for resuming background tasks in a storage environment. storage controller. The system is operable to receive host Input/Output (I/O) requests directed to a logical volume, and to couple with one or more of storage devices provisioning the logical volume. The system is further operable to process the host I/O requests directed to the logical volume, to initiate a background processing task distinct from the host I/O requests and related to the logical volume, and to store progress information on at least one of the one or more storage devices describing progress of the background processing task.

Methods and structure for resuming background tasks in a clustered storage environment

Methods and systems for transferring ownership of a logical volume in a storage system comprising multiple storage controllers is provided. According to the method, the storage controllers are coupled for communication with a logical volume, wherein at least one storage device coupled with the storage controllers implements the logical volume. The method comprises identifying, at a first storage controller, a second storage controller to receive the logical volume. The method also comprises initiating a transfer of ownership of the logical volume from the first storage controller to the second storage controller by transferring metadata stored in a memory of the first storage controller to the second storage controller, the metadata existing in a native format that describes the configuration of the logical volume on the at least one storage device.

Methods and structure for transferring ownership of a logical volume by transfer of native-format metadata in a clustered storage environment

Methods and system are provided for exposing logical volumes to host systems and storage controllers in a consistent manner across a clustered storage system. One embodiment is a storage controller. The storage controller is operable to communicate with other storage controllers within the clustered storage system. The storage controller is further operable to generate a proposed Logical Unit Number (LUN) for a logical volume provisioned at the storage devices, and to communicate with each of the other storage controllers within the clustered storage system requesting that the other storage controllers determine if the proposed LUN is in use. If the proposed LUN is not in use, then storage controller assigns the proposed LUN to the logical volume. If the LUN is in use, then the storage controller generates a new proposed LUN and re-tries communication with the other storage controllers until a unique LUN is found.

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Sunnyvale, CA, United States of America

Guolin Huang