[Bug 200641] FreeBSD 10.1 doesn't support 4K bytes sector for NVMe

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200641

            Bug ID: 200641
           Summary: FreeBSD 10.1 doesn't support 4K bytes sector for NVMe
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: rogerchuonglai at yahoo.com

FreeBSD 10.1 fails operating system installation if the NVMe device doesn't
support 512 bytes sector size.
For NVMe devices, 4K sector size is typical for high performance applications. 
Although some NVMe also support 512 bytes by default, many of them support 4K
sector sizes also. I tested and collected traces to show this is the case. 

If FreeBSD is going mainstream for high performance applications, please add 4K
sector size support in the next FreeBSD version.

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