If a drive that fully implements the AACS spec opens a disk with a newer version of the MKB block, the drive will update its flash and refuse to downgrade to an

If a drive that fully implements the AACS spec opens a disk with a newer version of the MKB block, the drive will update its flash and refuse to downgrade to an older MKB block. If the software you are using to talk with the drive had its host certificate revoked in the newly update MKB, the drive will refuse to work with that software forever. A active network connection isn't required.