How can RAID be used to address green IT issues, and power and cooling challenges in the data center?

RAID information RAID levels defined Do RAID levels still matter? How to calculate available disk space on a RAID 5

RAID 1 has more drives running, so you are going to use more power. But, you have to take a look at the application. If the application requires performance, you have to factor in the cost of energy to get the work done. For nearline storage or offline storage, that's where you want to try to reduce power consumption. If the primary concern is performance, RAID 1 uses more power, but it also gets the work done faster, so it's a balancing act.

Check out the entire RAID FAQ guide.

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RELATED CONTENT Frequently asked questions When should I use the different levels of RAID? RAID is 20 years old. Is it as applicable today as it once was? With a shift toward solid-state disk and semiconductor memory-based storage, does that diminish the need for RAID to boost performance? With the advancements in RAID and storage systems, how come RAID still isn't a replacement for backup? Can you explain what dual parity, distributed parity and network RAID are, and why are they getting more and more attention? What are the performance issues with RAID 6 or dual-parity schemes? Is RAID only relevant for the enterprise, or should SMBs and SOHOs be concerned with RAID? Where is the best place and best technique for implementing RAID? It seems like 'hybrid' drives will be here long before true 'solid-state' drives. How do hybrid drives play into RAID schemes and tactics? What's happening with disk rebuild times? How do 'preemptive rebuilds' work, and what other techniques are appearing, if any, to accelerate rebuild times?

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