We don’t support the drive or software in Linux but If you are proficient with Linux partitioning you may be able to get it to work. You can put the drive into a Windows machine and run the Black2 software to unlock the drive. This should properly partition the drive into the 120GB SSD and the 1TB HDD. If you do not resize these partitions at all, it should work in your Linux system. You can, however, subdivide the existing partitions as long as you don’t resize them. The software splits the drive at the correct point between the SSD and HDD so files are not saved into the “gap”.
When you put the drive into your Linux system, you should be able to set your mount points in the advanced partitioning/formatting of the Linux Mint installer. Just have it re-format the existing partitions, but don’t let it resize or change the partition that marks the ‘gap’.