RAID is 20 years old. Is it as applicable today as it once was?

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RAID information
RAID levels defined

Do RAID levels still matter?

How to calculate available disk space on a RAID 5
Absolutely. RAID is becoming more common and transparent to the point that it doesn't have to be hyped and it loses its appeal, so to speak. Even though disk drives are more reliable, we are seeing more large-capacity drives being deployed and in different applications. RAID may not be needed for some scenarios, but we're seeing RAID trickle down into the SMB [small and medium-sized business], as well as further out into the enterprise. So whether it's a software or hardware internal RAID controller or an external RAID array, RAID continues to proliferate.

Also, there are new forms of RAID emerging, including distributed parity, local and remote parity, and dual-parity schemes.

Check out the entire RAID FAQ guide.

This was first published in November 2007

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