I have a Dell Precision M3800 that is supposed to have a self-encrypted hard drive. I'm running Windows 10. In the Storage Management screen, the disk claims to be a 'LITEONIT LMT-256L9M-41 MSATA 256GB SED'. 

I've set a hard drive password in the Dell BIOS, but how can I confirm that the contents of the disk are actually encrypted by a key tied to that password? The BIOS is very unclear about what is happening on that front, and I don't find options to do crypto-erase so I'm not sure how to assure myself that the contents are safe.

Also, does anyone know if it is possible to force the computer to prompt me to unlock the HD after waking from sleep, or do I need to shutdown in order to fully "lock" the hard drive?