I'm suspecting you've got an ashift=9 (512b sector) RAIDZ vdev there and you're adding a disk that ZFS wants to set to ashift=12 (4k sector). Hence the mismatch. You'll want to verify the ashift value ...
I'm trying to migrate from mdadm/lvm to zfs but it feels so different that I can't quite grok the differences. I've created a 'tank' mirror with my nice new shiny 2TB ...
When looking at ways to improve a ZFS pool, you'd be forgiven for considering a metadata vdev. This is precisely what I did when I wanted to improve the performance by storing all our data on the ...
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