Hi Artur,
I can not explain how Windows comes to 8192 bytes.
As explained in Jeremya F's email, that's the zvol default record size.
<https://msdn.microsoft.com/en-us/windows/compatibility/advanced-format-disk-compatibility-update?f=255&MSPPError=-2147217396>
about 512E drives. According to the article, the 512E drives should not
be used, because this configuration affects both the lifetime and the
performance of the drives.
Bhyve presents a virtual drive so this doesn't apply.
(https://msdn.microsoft.com/en-us/windows/compatibility/advanced-format-disk-compatibility-update?f=255&MSPPError=-2147217396)
For this reason, I started using 4K emulated drive, both logical and
physical (sectorsize=4096/4096), but Windows can not be installed on a
4K emulated drive.
I'd recommend sticking with "sectorsize=512/4096" for now.
The 4096/4096 appears to be a bhyve bug that needs to be fixed,
especially since the NVMe emulation GSoC project has been approved*, and
that mandates 4K block size.
later,
Peter.
* https://summerofcode.withgoogle.com/projects/#5252121027936256
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