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Microsoft® SQL Server 2012 Unleashed by Alex T. Silverstein, Chris Gallelli, Paul T. Bertucci, Ray Rankins

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RAID Level 10

RAID 10, or RAID 1+0, is a combination of mirroring and striping. It is implemented as a stripe of mirrored drives. The drives are mirrored first, and then a stripe is created across the mirrors to improve performance. This should not be confused with RAID 0+1, which is different and is implemented by first striping the disks and then mirroring.

Many businesses with high-volume OLTP applications opt for RAID 10 configurations. The shrinking cost of disk drives and the heavy database demands of today’s business applications are making this a much more viable option. If you find that your transaction log or index segment is pegging your RAID 1 array at 100% usage, you can implement a RAID 10 array to get better performance. This type ...

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