RAID 1 is usually implemented as mirroring; a drive has its data duplicated on two different drives using either a hardware RAID controller or software (generally via the operating system). If either drive fails, the other continues to function as a single drive until the failed drive is replaced. Conceptually simple, RAID 1 is popular for those who require fault tolerance. RAID I, for example, writes two copies of the data simultaneously on two separate drives.

This is called fault tolerant because if one of the mirrored drives suffers a mechanical failure (e.g. spindle failure) or does not respond, the remaining drive will continue to function. The RAID 1 configuration is performed either by a hardware RAID controller… or performed in software. It is suited to applications requiring high fault tolerance at a low cost and where a duplicated set of data is more secure than using parity.

We use raid-1 array in all of our shared/reseller servers for securing your data, high uptime and pluse redudancy.

A RAID device maintains a mirror of all the data in a partition... on another partition. This second partition is usually on another drive (note: in Linux systems the second partition can be on the same drive). There is a small performance hit to be expected when configuring your hard disks in a RAID 1 partition as the data has to be written to every disk in the RAID array.

Note: Raid-1 array is used for shared/reseller servers only. We use raid-10 array for our
Dedicated servers.