Product : Amazon, AWS/AWS, IAAS VMs
Feature : VM Live Migration, Control, Compute VM
Content Owner:  WhatMatrix Community
Summary
If a host fails and the EC2 instance uses EBS, it is possible to start the EC2 instance on another host manually or automatically with monitoring and scripting; if an EC2 instance is installed on instance store and de host fails, the EC2 instance is lost
Details
Some work-arounds are: using an auto scaling group, create a script and use Cloudwatch to trigger this script, in case of degraded hardware stop the instance and start it again; it will start on healthy hardware