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ALSO CALLED: Array, R A I D Array, Storage Arrays, Arrays, RAID Array, Redundant Array of Inexpensive Disks, R A I D, Redundant Array of Independent Disks, Disk Arrays
DEFINITION: In computers, parity (from the Latin paritas: equal or equivalent) refers to a technique of checking whether data has been lost or written over when it's moved from one place in storage to another or when transmitted between computers.Here's how it works: An additional binary digit, the parity bit, is added to a group of bits that are moved together. This bit is used only for the purpose of identifying  … 
Definition continues below.
RAIDReports
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Oracle RMAN Disk-to-Disk Backup Methods Using Sun Storage Array
sponsored by Oracle Corporation
WHITE PAPER: This document provides a high-level description of how to implement an RMAN backup and recover methodology using Sun® storage arrays as the storage medium. For more information about Oracle best practices, refer to Best Practices for Running Oracle RAC Database with ASM on a Sun Storage 6540, 6580, or 6780 Storage Array.
Posted: 21 Mar 2011 | Published: 01 Jul 2010

Oracle Corporation

E-Guide: Improve your performance and avoid bottlenecks in your storage networks
sponsored by PC Mall
EGUIDE: This e-guide will help you improve your storage-area networks (SANs) and fine-tune your storage networks. Find out what steps you should take to prepare your SAN for the worst, and learn what you can do to improve your storage network performance, efficiency and resiliency. Check out this e-guide today!
Posted: 14 Mar 2011 | Published: 14 Mar 2011

PC Mall

Simpana® Software—A Unique Cloud-Enabled Platform
sponsored by CommVault Systems, Inc.
WHITE PAPER: Check out this white paper to see how Simpana software seamlessly extends local backup and archive to a new tier of cloud-based storage. Virtually unlimited storage capacity from out integrated cloud storage partners helps users dramatically reduce costs and operational complexity while improving long-term compliance.
Posted: 17 Feb 2011 | Published: 17 Feb 2011

CommVault Systems, Inc.

E-Guide: Virtual Tape Libraries and Data Deduplication in Enterprise Storage Today
sponsored by Fujitsu America, Inc.
EGUIDE: Download this guide to learn more about the solutions surrounding virtual tape libraries and data deduplication in today’s enterprise storage environments.
Posted: 03 Jan 2011 | Published: 30 Dec 2010

Fujitsu America, Inc.

A Better RAID Strategy for High Capacity Drives in Mainframe Storage
sponsored by Oracle Corporation
WHITE PAPER: This paper demonstrates that RAID 6 is less capable to prevent data loss with today's large capacity SATA and SAS HDDs. It will also share Oracle's designs to mitigate this risk. The integrity of customers' data is in jeopardy if these large capacity SATA/SAS HDDs are simply packaged into a RAID 6 group without additional mitigation.
Posted: 21 Dec 2010 | Published: 21 Dec 2010

Oracle Corporation

Solving the Problem of Persistent Data Retention
sponsored by SGI
WHITE PAPER: Read this paper to learn the techniques for ensuring that persistent data in the enterprise today will really be available when it is needed in the future.
Posted: 17 Dec 2010 | Published: 17 Dec 2010

SGI

E-Guide: Best of 2010: The 10 Web Pages Most Read by UK-based IT Pros
sponsored by EMC Backup and Recovery Solutions
EGUIDE: This searchstorage.co.uk eguide is comprised of the best and most read expert articles. Read this brief guide to find out how to avoid the common pitfalls of  storage planning and how you can prepare your business for 2011.
Posted: 23 Nov 2010 | Published: 23 Nov 2010

EMC Backup and Recovery Solutions

The Architectural Advantages of Compellent Automated Tiered Storage
sponsored by Dell Compellent
WHITE PAPER: With the recent profusion of tiered storage solutions into the enterprise storage market, organizations are increasingly adopting tiering strategies to accommodate rapid data growth while controlling costs. Yet most solutions fail to maximize the potential benefits of tiered storage. Read this white paper to learn more.
Posted: 11 Nov 2010 | Published: 11 Nov 2010

Dell Compellent

Storage Magazine: September 2010
sponsored by SearchStorage.com
EDITORIAL RESOURCE GUIDE: In this month's cover story, Jacob Gsoedl explores how unstructured data became one of the top challenges in today’s organizations and highlights how file/NAS virtualization allows for future growth.
Posted: 02 Sep 2010 | Published: 02 Sep 2010

SearchStorage.com

Remote/Branch Office Data Protection and System Availability
sponsored by arcserve
WHITE PAPER: There are many approaches to remote office data protection and system availability. This paper describes best practices in using available technologies for protection, recovery and availability of remote or branch office systems, applications and data.
Posted: 19 Aug 2010 | Published: 19 Aug 2010

arcserve

Fluid Data Storage: A How To Guide - Intelligent storage automation for IT administrators
sponsored by Dell Compellent
WHITE PAPER: SANs are frequently difficult to set up and configure, requiring a lot of effort to perform necessary tasks. This paper explains how a Fluid Data architecture can make life as a storage admin much easier.
Posted: 02 Aug 2010 | Published: 24 Feb 2010

Dell Compellent

Uncompromising Reliability through Clustered Storage
sponsored by Isilon Systems
WHITE PAPER: This white paper describes the limitations of traditional data protection technologies and examines Isilon IQ’s revolutionary new approach to ensuring data integrity and availability in large clustered storage environments.
Posted: 26 Jul 2010 | Published: 21 Feb 2008

Isilon Systems

Presentation Transcript: The Basics of RAID
sponsored by Nexsan
PRESENTATION TRANSCRIPT: A RAID is a method of ganging up, so to speak, a bunch of disk drives, such that the availability and/or the performance is actually improved. Read this transcript for more basics of RAID.
Posted: 08 Jul 2010 | Published: 08 Jul 2010

Nexsan

DXi-Series Disk Backup Systems with Data Deduplication: Providing Comprehensive Data and System Integrity
sponsored by Quantum Corporation
IT BRIEFING: Access this paper now for a detailed look at the processes that operate at the solution, file system, and system hardware levels of the Quantum’s DXi®-Series disk backup solutions.
Posted: 07 Jun 2010 | Published: 25 Nov 2009

Quantum Corporation

Storage Magazine * May 2010: R.I.P RAID?
sponsored by SearchStorage.com
EGUIDE: RAID has been a mainstay of data protection for decades, but now its days may soon be numbered. In the May 2010 cover story of Storage magazine, Marc Staimer details the various issues of traditional RAID today and highlights how alternative technologies aim to address these problems.  More...
Posted: 05 May 2010 | Published: 05 May 2010

SearchStorage.com

Delivering IT as a Service for Virtualized Data Centers
sponsored by Continental Resources
WHITE PAPER: Architecting a successful cloud computing infrastructure can be challenging. The secure cloud architecture offers the best products and features to create a cloud service that can realize the efficiencies of shared infrastructure while still offering the security, flexibility, resilience, and ease of management of a traditional IT deployment.
Posted: 01 Apr 2010 | Published: 01 Apr 2010

Continental Resources

Six Tips for Reducing Downtime in Travel and Transport
sponsored by Marathon Technologies
WHITE PAPER: Whether it's a security system, baggage handling application, order or vessel tracking downtime to applications supporting travel and transportation can throw off precisely timed schedules for travelers and shipments alike. This paper outlines six key tips for keeping travel and transportation logistics applications running without interruption.
Posted: 23 Feb 2010 | Published: 23 Feb 2010

Marathon Technologies

IDC White Paper: Key Criteria in Selecting an Enterprise Online PC Backup Solution
sponsored by Iron Mountain
WHITE PAPER: This paper illustrates the top–level benefits of online PC backup. Read this paper to learn more about how to choose an online PC backup solution for your mid-sized organization or enterprise!
Posted: 11 Jan 2010 | Published: 15 Dec 2008

Iron Mountain

RAID FAQ Presentation Transcript
sponsored by Nexsan
PRESENTATION TRANSCRIPT: Please read this presentation transcript, in which Andrew Burton, features editor for searchstorage.com, interviews Greg Shulz, Founder and Senior Analyst with Storage Dial Group, about RAIDS. Shulz will provide a synopsis of the different RAID levels, their characteristics and when to use each level?
Posted: 08 Dec 2009 | Published: 07 Dec 2009

Nexsan

The Raw Truth about Storage Capacity
sponsored by Xiotech Corporation
WHITE PAPER: This paper examines several factors that limit the capacity of your data storage system and how they contribute to the true cost of storage.
Posted: 19 Nov 2009 | Published: 19 Nov 2009

Xiotech Corporation

Adaptec Zero-Maintenance Cache Protection
sponsored by Adaptec, Inc.
PRODUCT OVERVIEW: Adaptec Series 5Z RAID controllers with Zero-Maintenance Cache Protection (ZMCP - pronounced “zemcap”) provide maximum protection for cached data and eliminate the substantial costs and environmental impact of complex, messy and expensive Lithium Ion batteries, while improving cache protection and cache performance.
Posted: 04 Nov 2009 | Published: 04 Nov 2009

Adaptec, Inc.

On-Demand Hosting Provider SoftLayer Relies On Adaptec
sponsored by Adaptec, Inc.
CASE STUDY: When On-Demand Hosting Provider SoftLayer needed a single provider of SATA/SAS who offered the flexibility they needed, they turned to Adaptec.
Posted: 02 Nov 2009 | Published: 21 Oct 2009

Adaptec, Inc.

Adaptec Intelligent Power Management: Reducing IT Costs and Storage Power Consumption by Up to 70%
sponsored by Adaptec, Inc.
WHITE PAPER: The challenge of saving power while maintaining server performance has become a primary concern within the IT environment. But, the latest generation of Adaptec RAID controllers provides Intelligent Power Management software and supports a variety of techniques that, together, enable significant savings without compromising performance.
Posted: 29 Oct 2009 | Published: 27 Oct 2009

Adaptec, Inc.

How to Select the Correct RAID for an EqualLogic SAN
sponsored by Dell India
WHITE PAPER: One of the most important decisions that you have to make when deploying a new storage solution is what RAID type(s) to use. Read this white paper for a discussion on how to select the right RAID policy for your Dell EqualLogic™ storage area network (SAN) arrays.
Posted: 29 Sep 2009 | Published: 29 Sep 2009

Dell India

Virtualize Your End-to-End IT infrastructure and Reduce OpEx and CapEx
sponsored by Hewlett-Packard Company
WHITE PAPER: Many companies that have deployed server virtualization are still struggling with massive data growth, rising storage maintenance cost, and underutilized storage assets from a multitude of vendors. A virtual storage infrastructure from HP can double your capacity utilization and cut management costs in half.
Posted: 23 Sep 2009 | Published: 21 Sep 2009

Hewlett-Packard Company
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RAID DEFINITION (continued): …  whether the bits being moved arrived successfully. Before the bits are sent, they are counted and if the total number of data bits is even, the parity bit is set to one so that the total number of bits transmitted will form an odd number. If the total number of data bits is already an odd number, the parity bit remains or is set to 0. At the receiving end, each group of incoming bits is checked to see if the group totals to an odd number. If the total is even, a transmission error has occurred and either the transmission is retried or the system halts and an error message is sent to the user.The … 
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