https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192097
Allan Jude <allanj...@freebsd.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|New |Closed
Resolution|--- |Works As Intended
--- Comment #1 from Allan Jude <allanj...@freebsd.org> ---
It is a configuration error however. Using 512b for 4k devices will cause
performance degradation because of the read-modify-write that the hardware will
have to do for every 512b write.
I don't think it makes sense to locally modify the behaviour of ZFS in this
instance.
Hopefully we will eventually get the "Time Variable Geometry" feature for ZFS
that will allow all future allocations to be made 4k aligned, even in the face
of pools created on older versions of FreeBSD where we didn't have quirks in
place on some disks that lie about their sector size.
Video and Slides about the feature. "Oh Shift!"
https://www.youtube.com/watch?v=_-QAnKtIbGc
https://drive.google.com/file/d/0B5fzqkw_-diCZFVTZlpua3hjNWs/view?usp=sharing
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