Hi Tejun, I recently got my hands on an "Factory reCertified" (FC) Crucial M500 drive and noticed it was giving me errors when fstrim ran, much like they did back a few years ago. It seems Crucial modified the model numbers and hence, no longer get blacklisted, so I fixed it right away. I think, it should be the same for the M550s... I'll have to check when I get my hands on one. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html