RAID 10

RAID (Redundant Array of Independent Disks) 10 is a particular configuration of a RAID array. RAID allows numerous low cost disks to be combined into a single storage device. RAID is now used to replicate data across disks, adding redundancy for data and improving the stability of the storage device by allowing drives to be hot swapped and the array to be rebuilt in the event of disk failure.

The number following RAID signifies the particular configuration of an array.

At CatN we use numerous storage shelves for our RAID arrays, most notably two mirrored CoRAID servers, each with 24 bays, containing 750GB SAS drives, offering high performance for our hosted sites.

RAID10 is made up of RAID 1 and RAID 0.

In RAID 1 data is written to two disks simultaneously and identically, gaining redundancy from the second disk of a mirrored pair. If one disk in an array fails the disk can be replaced and the array rebuilt without any data loss.The probability of losing data is massively reduced with this configuration. As low as 0.25% every three years.

In RAID 0 data is split evenly across all the disks in the array, which acts as a single logical device, but can be split into small virtual drives. There is no redundancy offered from mirroring data and RAId 0 is commonly used for performance reasons and individual drives can seek data independently.