RAID was once the redundant array of inexpensive disks, but it has come to be known as a redundant array or independent disks. The disks are often used in servers to ensure that data will not be lost as it is written to more than one place at the same time. RAID system have been broken up into a number of different levels may be used, and the systems that are created with RAID disks protect against data loss, expand storage and provide higher performance because of how the disks are laid out. RAID systems were started at Level 0 where there are no mirrored disks, but there are many places to store data. The storage is expanded similarly in a Level 1 disk, but it is mirrored to ensure redundancy.
There are several other levels that use combinations of data striping that places the same data on different disks, and they will ensure that there is no data loss. Each level uses a different variation of disks and mirrors to improve performance, and each one provides some level of redundancy and performance speed. Someone who is utilizing a RAID system will find that they may have data rewritten in an instant if it is lost. Any failure in the system will cause the data to be copied from another disk, and the data is restored instantly. The data is pulled from different disks in sequence, and the speeds increase as the data is pulled from one disk to another. Someone who has not used RAID before will find it much faster than other systems of the same type.
Avoiding Single Drives
Single drives caused a number of losses data because they did not back up themselves in any way, and RAID systems came along as an alternative to the single disk drive. The single disk could be lost forever, but another disk in the RAID system will pick up the slack. Someone who is unaware of the data storage system they are using may still be on a single disk system, and they must begin using a RAID system as soon as possible. They are used most often on servers, and someone who wants to make the change will find many different products use RAID in varying styles and levels. Choose the level that makes the most sense, offers the most protection, and increase speed.