ZFS raidz and 4k sector disks

[Pascal Stumpf]

I have exactly that setup (3 drives, GPT partitions aligned to 4k 
boundaries, geli with 4k sector size, on top of that RAID-Z), and 
the write performance is the same as with a single ZFS partition on 
a regular 512-sector disk. So yes, it does work. (I don’t have a 
benchmark on how geli affects RAID-Z performance though, since 
all my ZFS partitions are encrypted.