Lsi Corporation

Lsi Logic Corporation

Satish Sangapu

William Hetrick

Joseph Moore

Kevin Lee Kidney

Arindam Banerjee

Forrest Trimbell

Derek J Bendixen

A method and controller device for supplying battery power to a virtualized storage environment having a storage controller with a virtual machine manager and a second virtual machine. In response to a battery engaged event, the first virtual machine manager enables the image of the second virtual machine to be shared with a new instance of the second virtual machine so that the image does not have to be loaded therein. The first virtual machine manager then creates the new virtual machine. The old virtual machine shuts down non-necessary hardware devices and sets necessary hardware devices to low power mode. During this time, the new virtual machine executes a backup specific start-of-day (SOD) initialization sequence. The method also synchronizes the new and old virtual machines. The method also initiates a cache memory backup operation upon synchronization of the new and old virtual machines and then shuts down the old virtual machine.

Method and system for reducing power loss to backup IO start time of a storage device in a storage virtualization environment

Storage array operations, such as code downloads and other operations of the type that cause loss of access to portions of the storage array, are managed in a manner that preserves access to other portions of the storage array so that other storage array operations, such as data synchronization, can continue.

Managing storage array operations that cause loss of access to mirrored data

The present invention is a system for optimizing the reconstruction and copyback of data contained on a failed disk in a multi-disk mass storage system. A system in accordance with the present invention may comprise the following: a processing unit requiring mass-storage; one or more disks configured as a RAID system; an associated global hot spare disk; and interconnections linking the processing unit, the RAID and the global hot spare disk. In a further aspect of the present invention, a method for the reconstruction and copyback of a disconnected RAID disk utilizing a global hot spare disk is disclosed. The method includes: disconnecting a RAID component disk; reconstructing data from the disconnected RAID disk onto a global hot spare disk; reconnecting the disconnected RAID component disk; and copying the reconstructed data from the global hot spare disk back to the reconnected RAID component disk.

Optimized reconstruction and copyback methodology for a disconnected drive in the presence of a global hot spare disk

The present invention is an optimized method for the rollback of copy-on-write snapshot volumes. A method in accordance with the present invention may comprise the following steps: (a) creating a copy-on-write snapshot volume; (b) receiving a base volume write request addressed to a base volume data block; (c) executing copy-on-write operations; (d) receiving a snapshot volume rollback request; (e) disabling the copy-on-write operations; and (f) executing volume copy operations.

Optimized rollback of copy-on-write snapshot volumes

The present invention is directed to a method of an adaptive procedure table which is capable of providing default behaviors for each procedure if a corresponding procedure is not defined or has been removed from a software build. The default behaviors for each procedure may be defined in a template file provided by a developer before a compile time of software. The present invention may permit a module that defines the implementation of a procedure to be removed from the software build without requiring source code changes. As such, the developer may be allowed to remove or add certain features from a compiled program without introducing compile time or link time errors.

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Wichita, KS, United States of America

Satish Sangapu