The data storage protection and performance benefits you can achieve from RAID technologies depend on the RAID level you're using. For example, RAID 0 can increase data performance, but at the risk of decreased data protection.
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We've compiled our most recent information on RAID levels to help storage pros effectively
utilise this technology in their data storage systems. Learn more about which RAID level will fit
your storage infrastructure's needs, which RAID level has the best price-to-performance comparison,
which configuration is best suited for a storage-area network (SAN) and more.
RAID levels: RAID 0 through RAID 6
For organisations considering a RAID deployment, there are multiple factors that need to be looked at, especially the levels of RAID. In this SearchStorage.co.UK podcast series, Arun Taneja, senior analyst and founder of the Taneja Group, examines the functions and differences of the various RAID levels. You can listen to Arun's thoughts on RAID 0 through RAID 6, or you can read a transcript of them.
to choose the right RAID configuration for a new storage-area network
A business intends to acquire a storage-area network (SAN) to move away from direct-attached storage (DAS). Half of their data is in a business-critical SQL database and Microsoft Exchange Server, while the other 50% consists of Microsoft Office documents. In this Ask the Expert, Martin Taylor helps them decide which RAID levels they should consider for their new SAN.
RAID level has the best price-to-performance comparison?
RAID levels are arrived at by combining the following attributes: a) mirroring data between sets of drives; b) striping data across drives; c) striping mirror sets or mirroring striped sets; and d) using parity data to enable disk rebuilds. But a key aim of RAID is data protection. With data protection as a goal, this article examines the price-to-performance comparisons of the various RAID configurations.
RAID level is best: the dual parity of RAID 6 or the mirrored data of RAID 10?
Many storage managers have a hard time deciding which RAID level to use to achieve the best availability and reliability. Should they use the dual parity of RAID 6 or the mirrored data of RAID 10? To help you choose the RAID level that best meets the needs of your organisation, this article takes a look at some of the advantages and disadvantages of RAID 6 and RAID 10.
define RAID levels
RAID technology combines two or more physical drives into a logical unit presented as a single hard drive to the operating system. But understanding the key concepts of the various RAID levels, such as mirroring, striping and parity, can be crucial to effectively leveraging the technology. This article examines the benefits and drawbacks of RAID 0 through RAID 6, including RAID 0 + 1 and RAID 1 + 0.
choose the right RAID level
Aligning the right RAID level to the application and type of disk drive and budget criteria is as relevant today as it was 10 years ago. In the end, it's going to come down to a balancing game between your budget dollars, performance requirements, data availability, capacity, energy consumption and survivability. This tip offers nine things to consider when deciding which RAID level is right for your organisation's needs.
This was first published in December 2009