@JaredBusch said in Hard disk encryption without OS access?:
Define encrypted at rest please. From the flow of your post, I assume it means when the server is shut off.
The data on the drive. The OS will decrypt it when it or an application needs access.
So powered off, yes. Or another OS, like a live boot from usb or CD.
Self Encrypted Drives seem to be the only way to go. We may be be stuck with going to their cloud platform....