AWS Fault Injection Simulator (FIS) now supports Pause I/O for Amazon EBS volumes as a new FIS action type. With the new fault action, customers with highly available applications can test their architecture and monitoring, such as operating system timeout configurations and CloudWatch alarms, to improve resiliency to storage faults. Customers can observe how their application stack responds, and tune their monitoring and recovery process to improve resiliency and application availability.
Source:: Amazon AWS