Hi there!

From the notes, I understand that your EC2 instance is failing the status check after attempting to detach and attach a new volume.

For guidance, reasons that can cause an instance to fail to boot are:

1. Using incorrect device names when attaching the volume [1].
2. Incorrect entries in the fstab file due to booting from secondary volumes attached to the instance. Please refer to document link [2] to troubleshoot issues when booting from a different volume.

To troubleshoot the issue from your side, you can check the instance's system logs to determine the cause of the failure [3]. Depending on the cause of failure you may use [4] to further troubleshoot.

I hope you find the above information helpful.

Have a great day ahead!

References:

[1] https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/RootDeviceStorage.html [2] https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-booting-from-wrong-volume.html [3] https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstances.html#troubleshooting-retrieve-system-logs [4] https://aws.amazon.com/premiumsupport/knowledge-center/ec2-linux-status-check-failure/