Windows 10 Doesn't Support for AF 512e? in Hard Disk Drives (HDD) Posted January 16, 2017 · Edited January 16, 2017 by jwells · Report reply According to Microsoft bulletin: https://support.microsoft.com/en-us/kb/2510009 HDD's with 512b logical emulation over 4k physical sector (aka AF 512e) is not supported on Windows 10. How can that possibly be? The great majority of current generation large capacity HDD's are 512e. The only others are 512n (512b logical/physical) which is legacy old and seems to be limited to drives 4TB and under, and AF 4Kn (3096 logical/physical) which is fairly new and largely found only on enterprise drives. What the deal?