RAID-10

By Joe Gardiner Monday, 12th April 2010

RAID (redundant array of inexpensive disks), is a technology that allows cheap and potentially unreliable disk drives to be arranged into arrays that improve storage reliability. RAID allows data to be divided and replicated across multiple disk drives, and two or more physical discs can be treated as one logical storage unit. Different numbers following the RAID acronym describe different disk architecture aiming to increase disc reliability or input/output performance. RAID10 is made up of the concepts of RAID 1 and RAID 0 hence RAID10. RAID1 mirrors a disks content to another disk, so that the two discs are identical. The contents of a logical disc in an array is identical to the other logical disc in the array. RAID0 (striped discs) spreads data across all the discs in an array which improves speed when accessing the data. However, if a disc fails all the data on the disc will be lost. RAID10 spreads data across all the discs in an array, but also mirrors this spread data to a logical storage device (made up of multiple disc drives) in order to protect against disc failure.

Posted in Glossary | No Comments »