What is RAID and why does it matter?

23.11.2017 816

You have probably seen this RAID abbreviation, and you have wondered what it is?

RAID means – Redundant Array of Independent Disks. It is a replacement for the standard option of just one storage device and replacing it with an array of more storage devices. This way you get better performance and/or hardware data protection with a system of more than one drive. It is a technology that has been here for a while, more precise from the 70s. The first idea was to combine simple drives and make them work together. The result is higher capacity and faster configuration. A valuable extra the failover protection. Even if one of the drives fails, you can still continue without losing data (depends on the RAID configuration). Since then, there have been many applications of the RAID. RAID 0, RAID 1, RAID 5, and more.

RAID 0

This setup is all about speed. RAID 0 has higher read and write speed thanks to the distribution of the data across the different drives. It has far better performance than others, and you can use all of the space, but it lacks the redundancy. It doesn’t make a copy of your data across the drives and if it fails you will probably lose data.

RAID 1

It is mirroring the data between the drives. This is a good failover protection, if one of the drives gets damaged, the rest will still have a complete copy of your data and won’t affect you negatively. It has faster Reading speed but the same writing one. Also, the duplication of data will take extra space.

RAID 5

It has better speed and protection. The best from the both previous. The data is spread across multiple drives, and there is a trick. Parity data, this one is spread across the drives and has the information to recuperate the data of any of the failed drives.

There are also hybrid RAID, combinations of different configurations but these are the most common.

Now that you know what is RAID and why is it so important to have storage devices in a RAID configuration, always check that your service provider uses it. Find the best setup for you and increase the speed and redundancy. Adding one extra layer of protection is always worth it.