Model B vs Model C tape drives.
When LTFS firmware came out Quantum was using Model B tape drives but over time have upgraded to using Model C tape drives.
LTFS can we used with MAC OSX, Red Hat or SUSE Linux and Windows.
Windows has two versions of LTFS software one for Model B tape drives and one for Model C tape drives.
These two versions of software cannot be loaded on the same computer at the same time.
You need to determine your drive type and load the correct version of LTFS software.
These drives look differently. Please refer to the picture below to determine your model.