Redundant array of independent disks (RAID) is a popular data storage technology. It is widely used by companies and even individuals. Today we will discuss 4 common misconceptions about RAID to help you use it with a correct understanding.
Redundant array of independent disks (RAID) is frequently used by businesses and normal computer users. Compared to basic storage methods, it provides more flexible forms of storage and backup. And at the same time, diverse RAIDs can improve different computer storage performance as per what you want. However, RAID is not perfect as well. There are some myths about RAID that may affect its correct use. Now, follow us to see 4 common misconceptions.
1.All RAIDs are redundant.
Redundancy is the most reason why plenty of computer users choose the RAID. This is because it can offer 2 main powerful advantages.
- If one independent disk fails, people will not lose their data. And they can replace the failed disk without interrupting the work.
- You can perform basic physical maintenance in an uninterrupted situation.
Therefore, many people think that all the RAIDs are redundant. But it’s not true.
Obviously, RAID 0 has no redundancy at all. The data in RAID 0 is split equally to each disk in the array. In this way, it can offer much faster write and read speed for people. This is also the reason why there are still many people that like to use it.
2.RAIDs are backups.
Many RAIDs like RAID 5 have mirrored systems. So they have redundancy as well and can decrease the risk of data loss when encountering failure disks. But data redundancies are not backups. As a matter of fact, if too many disks in the array get corrupt, then there is a great chance that you will come across data disasters. If the data is very vital to you, you should keep other backups in other way to ensure the safety of the data. For example, when meeting corrupt Outlook, you can both resort to backups and redundancy.
3.RAID fails obviously most of the time.
Actually, when a single disk fails, the system will keep running in degraded mode. In this mode, you can access all the data as normal. Thus if there is no dedicated system administrator who have to check the array regularly, then you might not discover the problem before more disks fail. And in this way, it will definitely cause severe data loss eventually.
4.It’s rare that 2 disks will fail together.
Many people have a common misconception that 2 disks will not fail together most of time. But in fact, the array usually uses disks with same forms. And the disks are working in the similar conditions. If one disk fails, other disks tend to fail as well. Thus you should never lower your guard and should check the disks in a regular manner.
Allissa Shen is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including damaged SQL Server and word recovery software products. For more information visit www.datanumen.com