Netapp, Inc.

Lsi Corporation

Satish Subramanian

Senthil Kannan

Selvaraj Rasappan

Hariharan Kamalavannan

Mahmoud K Jibbe

Ganesh Sivaperuman

Suresh Dhanarajan

Prakash Palanichamy

Disclosed is a low power consumption storage array. Read and write cycles are separated so that a multiple disk array can be spun down during periods when there are no write requests. Cooling fans are operated with a pulse-width modulated signal in response to cooling demand to further reduce energy consumption.

Low power consumption storage array

A method for storing data and two sets of distributed mirrored data disposed as data stripes which permits data recovery without the necessity of parity calculations, is described. Redundant data are stored in groups of five physical hard drives which are logically segmented into stripe groups, each stripe group having three data stripe sets wherein one data stripe is protected by two distributed mirror stripes in accordance with an algorithm. The present method provides protection for all one- and two-disk failures and certain three-disk drive failures, for each physical five disk group, and retains a usable disk capacity of 33%.

Data redundancy using two distributed mirror sets

A method, system, and apparatus a method for remote data back up with de-duplication and recovery from clustered secondary storage arrays are disclosed. In one embodiment, a method includes writing a set of data of a primary storage module (e.g., may be coupled to the secondary storage cluster with a fiber channel network) to a secondary storage module of a secondary storage cluster, writing an other set of data of the primary storage module to an other secondary storage module coupled to the secondary storage module, writing the set of data from the secondary storage module to the other secondary storage module of the secondary storage cluster (e.g., the other secondary storage module may contain both the set of data and the other set of data), and writing the other set of data from the other secondary storage module to the secondary storage module.

Method for remote data back up with de-duplication and recovery from clustered secondary storage arrays

A first physical capacity of a first physical storage device is determined. A second physical capacity of a second physical storage device that has a physical capacity greater than the first physical capacity is determined. A storage space pool comprising at least a first logical drive, a second logical drive, and a third logical drive is created. The first logical drive corresponds to the first storage device and has the same capacity as the first physical capacity. The second logical drive corresponds to a first portion of the second storage device. The third logical drive corresponds to a second portion of the second storage device. The first portion and the second portion having at least the first physical capacity. Thus, two portions having at least the first physical capacity are utilized on the second physical drive instead of just one portion.

Growing community of inventors

Chennai, India

Satish Subramanian