We use RAID 0 when we need more IOPS, and it's more important than fault tolerance. In RAID 0, data is striped in volumes. So, we can add multiple volumes in RAID 0 to get maximum performance.
For example, suppose that you are running a database instance where a very high number of read and write operations are being performed. In this case, your instance needs more and more IOPS to handle the operation. Currently, your instance has 100 GB GP2 volumes, which gives you around 300 IOPS and 160 MBps throughput, but your machine needs to have around 320 MBps throughput. To achieve this, you can add one more volume and configure RAID 0. After the RAID configuration, you will get 600 IOPS and 320 MBps throughput.
However, there is a disadvantage ...
