On Tue, Oct 11, 2011 at 08:17:55PM -0400, John D Groenveld wrote:
> Under both Solaris 10 and Solaris 11x, I receive the evil message:
> | I/O request is not aligned with 4096 disk sector size.
> | It is handled through Read Modify Write but the performance is very low.

I got similar with 4k sector 'disks' (as a comstar target with
blk=4096) when trying to use them to force a pool to ashift=12. The
labels are found at the wrong offset when the block numbers change,
and maybe the GPT label has issues too. 


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