Which one is better, one 300GB EBS or three 100GB EBS?

Question

When launching a new EC2 instance with EBS (especially the new C4 instance), which one is better? Assuming I need to provision 300 GB total.

1. 1 single 300 GB EBS storage to get 900 IOPS (General Purpose SSD) or

2. 3 EBS storage with 100 GB each and get 300 IOPS (General Purpose SSD) only for each storage?

Any idea?

Answer 1

Option 1 will give you faster performance and better reliability. With 3 EBS volumes you need to stripe them to make a single one and a failure on any of the three will result in a complete failure of all.