Sorry... I only saw the "from an FAS2050" on my browser screen. As far as our experience, the SAS 450G 15K drive is the same on both models, the cage/disk slide mount is the same and should be able to function the same in both units. If NetApp has proprietary microcode on their drives, ONTap should recognize the drive in either NAS so long as the head/cyl configuration is the same as your existing drives in the FAS 2050