If it's an OPAL drive, and OPAL encryption was used, then it's protected at the hardware level - you need to get the correct OPAL/SED unlock tool* from the drive manufacturer to disable the encryption.
Since you've used DBAN etc, you've destroyed the EEPC system - you won't be able to unlock it using the McAfee tools anymore.
Doing so will invalidate all the data on the drive, but since you don't care about that you'll be able to start fresh.
For example, Seagate drives can be reset using SEATOOLS - SeaTools | Seagate
*Sometimes this can be done in the BIOS/UEFI - there's often a "secure erase" option, or "disable SED/OPAL".
Thank you for the info. The weird thing is we haven't enabled OPAL as far as I know. There is no password set on the hard drive. I'm seeing something similar on a couple other machines. They boot up and function properly but looking at encryption status shows "PhysicalDisk0 Encrypted" instead of the usual "C: Encrypted" Any attempt to format or wipe drive fails and DETech gives a version mismatch saying Drive Encryption Version 86.118 was detected.
Maybe it was enabled by another tool? If you're sure the Opal version of the client is not being deployed then that's the most likely scenario.
There is a different version of DETech for Opal drives which may be helpful - https://kc.mcafee.com/resources/sites/MCAFEE/content/live/PRODUCT_DOCUMENTATION/ 24000/PD24871/en_US/de_710_detech_user_g…