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RAID Levels Explained

RAID Levels Explained
If you've ever looked into purchasing a NAS device or server, particularly for a small business, you've no doubt come across the term "RAID." RAID stands for Redundant Array of Inexpensive (or sometimes "Independent") Disks. In general, a RAID-enabled system uses two or more hard disks to improve the performance or provide some level of fault tolerance for a machine—typically a NAS or server. Fault tolerance simply means providing a safety net for failed hardware by ensuring that the machine with the failed component, usually a hard drive, can still operate. Fault tolerance lessens interruptions in productivity, and it also decreases the chance of data loss. The way in which you configure that fault tolerance depends on the RAID level you set up. RAID Overview RAID is traditionally implemented in businesses and organizations where disk fault tolerance and optimized performance are must-haves, not luxuries. Which RAID Is Right for Me? Here's the rundown on popular RAID levels:

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RAID 0, RAID 1, RAID 5, RAID 10 Explained with Diagrams by Ramesh Natarajan on August 10, 2010 RAID stands for Redundant Array of Inexpensive (Independent) Disks. On most situations you will be using one of the following four levels of RAIDs. Cloud Computing vs. Virtualization EmailShareEmailShare Like the article? Cloud computing and Virtualization are both technologies that were developed to maximize the use of computing resources while reducing the cost of those resources. They are also mentioned frequently when discussing high availability and redundancy. While it is not uncommon to hear people discuss them interchangeably; they are very different approaches to solving the problem of maximizing the use of available resources.

Storage Optimization Techniques: Review the Benefits of Thin Provisioning Introduction For several years Wikibon has been studying the benefits of virtualization and thin provisioning. Our research spans dozens of detailed customer interviews and studies of many hundreds of customers over several thousand storage volumes. As well, our information has been validated through Wikibon's Energy Lab, which produces studies designed to assist customers in understanding the degree to which a product contributes to energy efficiency. Our objectives in conducting efficiency analyses are to identify not only the hardware impacts on issues related to utilization and energy consumption but more importantly the hard-to-quantify green software aspects of technologies. Wikibon Energy Lab Validation Reports are submitted to utilities such as Pacific Gas & Electric Company as part of an energy incentive qualification process where often outside engineering firms have validated our findings.

Creating a VM clone for a virtual machine template A VM clone is a complete duplicate of a particular virtual machine (VM) at that precise moment in time. Cloning a virtual machine is not intended for backup, disaster recovery (DR) or other data protection purposes. The most common use of a VM clone is in the mass deployment of standardized VMs. Cloning a virtual machine that is appropriate for a new workload and tailoring it for specific needs is more efficient than creating new VMs manually and then installing their operating systems and applications. VM cloning is also useful for test and development.

Advantage, disadvantage, use RAID is a technology that is used to increase the performance and/or reliability of data storage. The abbreviation stands for Redundant Array of Inexpensive Disks. A RAID system consists of two or more drives working in parallel. These disks can be hard discs, but there is a trend to also use the technology for SSD (solid state drives).

Data Center Infrastructure,Storage-Design Guide: SAN Distance Extension Using ISLs - Brocade Community Forums - 36627 Synopsis: Designs with best practices for a two-site data center disaster recovery solution using Brocade Fiber Channel ISL connections over extended distance. Contents Overview The most common reason for extending a Fibre Channel (FC) storage area network (SAN) over extended distances is to safeguard critical business data and provide near-continuous access to applications and services in the event of a localized disaster. Understanding Clones Features | Documentation | Knowledge Base | Discussion Forums Prev Contents Last Next A clone is a copy of an existing virtual machine. The existing virtual machine is called the parent of the clone. When the cloning operation is complete, the clone is a separate virtual machine — though it may share virtual disks with the parent virtual machine: see Full and Linked Clones). Changes made to a clone do not affect the parent virtual machine.

Tape Backup vs Hard Disk Backup: What Does the Future Hold? I was frequenting Spiceworks earlier today and came across a post asking if “tape was legacy”. I think what they were asking is whether backup to tape is the kind of legacy technology today that we see with VHS—there are still a few out there but the technology is on its way out. I realize that there are still advantages with tape when it comes to large volume backups and the ability to physically move the backup media to an offsite location. But even with these advantages it seems that backups to disk (and dare I say to the cloud?) have so many more advantages. Let’s do a quick comparison of tape and disk storage to consider the advantages of each:

Storgae RAID array,  Storage Servers and Subsystems , Unified IP-SAN, iSCSI & Fibre  SAN or NAS Raid Mission-Critical, High Availability Enterprise Rugged Storage array Systems Â… The ultimate Back-up NAS IP storage RAID solution! up to 200TB in single chassis or enclosure scales to 2-PTB Related page: Cluster Server Unlimited Data Backup & Storage. Simplified IP NAS Storage Solutions...up to 200TB STORAGE CAPACITY Cepoint R-STOR™ , RS-212, RS316 and Rx524, RX-8600 STORAGE RAID array systems are built for enterprise applications, while the RMS- series are designed and manufactured for Reliability, performance and durability in the most hostile Military or Industrial environments. Serial ATA stand alone NAS IP systems, SAS/SATA to SCSI or SATA to FC-AL 4GB/s Fibre Channel Host Bus Disk Arrays.

What is RAID (redundant array of independent disks)? - Definition from WhatIs.com What is RAID? RAID (redundant array of independent disks; originally redundant array of inexpensive disks) is a way of storing the same data in different places (thus, redundantly) on multiple hard disks. By placing data on multiple disks, I/O (input/output) operations can overlap in a balanced way, improving performance. Since multiple disks increases the mean time between failures (MTBF), storing data redundantly also increases fault tolerance. Ask your RAID questions at ITKnowledgeExchange.com A RAID appears to the operating system to be a single logical hard disk.

What is File Level Storage vs. Block Level Storage? : Education : Resource Center : StoneFly's iSCSI.com The two most popular storage system technologies are file level storage and block level storage. File level storage is seen and deployed in Network Attached Storage (NAS) systems. Block level storage is seen and deployed in Storage Area Network (SAN) storage. What is a hardware-based RAID? RAID Data Recovery. A RAID is considered hardware-based when it is implemented in hardware, either on the motherboard directly or a separate RAID card. Windows views the entire RAID as a single disk. The individual component disks are controlled by the RAID controller and not directly accessible to Windows. RAID (redundant array of independent disks) levels 0, 1, 3 and 5 are the levels typically implemented in hardware-based solutions. Hardware-based RAID uses an intelligent drive controller and a redundant array of disk drives to protect against data loss in the event of media failure and to improve the performance of read/write operations.

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