Several users have reported that their Momentus XTs are corrupting files on Linux and Mac OS X. This question on Super User gives a brief overview of the situation:

I am one of those users experiencing such an issue, and I am wondering if other Momentus XT users can reproduce this problem. I have given step-by-step instructions for reproducing this problem in a post on the Seagate forums:

If you have tried reproducing the problem, please let me know the result.