force
Forces the instance to stop. The instance will first attempt a graceful shutdown, which includes flushing file system caches and metadata. If the graceful shutdown fails to complete within the timeout period, the instance shuts down forcibly without flushing the file system caches and metadata.
After using this option, you must perform file system check and repair procedures. This option is not recommended for Windows instances. For more information, see Troubleshoot Amazon EC2 instance stop issues in the Amazon EC2 User Guide.
Default: false