RAID technology – Explained

RAID (originally redundant array of inexpensive disks; now commonly redundant array of independent disks) is a data storage virtualization technology that combines multiple disk drive components into a logical unit for the purposes of data redundancy or performance improvement.

Data is distributed across the drives in one of several ways, referred to as RAID levels, depending on the specific level of redundancy and performance required. Many RAID levels employ an error protection scheme called 'parity', a widely used method in information technology to provide fault tolerance in a given set of data. Fault tolerance is the property that enables a system to continue operating properly in the event of the failure of (or one or more faults within) some of its components. So if either one of the drives in such unit fails, the other continues to function as a single drive until the failed drive is replaced.

We provide software and hardware RAID with our dedicated servers.

Software RAID can be implemented as a layer that abstracts multiple devices, thereby providing a single virtual device with several RAID functions. Minus of this type is that being a software piece it uses the OS CPU and memory resources.

Dedicated servers that support software RAID are highlighted in green in the screenshots below:
 


Hardware RAID in its turn boots with the OS and is integrated to firmware via corresponding drivers. Thus, it is faster and more reliable than the software one, having its own processor and memory. Servers that support hardware RAID are highlighted in yellow:




That's it!

              
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