I lost my buildserver - uncontactable, but not terminated. Can't even 'force off'. It had nothing to do with any form of AWS provisioning (manual ansible; a job

I lost my buildserver - uncontactable, but not terminated. Can't even 'force off'. It had nothing to do with any form of AWS provisioning (manual ansible; a job for Monday), and it's a relatively recent machine (couple of months, t2.medium). Got an email from AWS that the host had degraded, and I noticed the instance was having weird disk issues earlier. "Description: The instance is running on degraded hardware"