Thanks for bringing the 4k sector issue to our attention. Having read up a bit on the matter, I'm inclined to agree that the current workarounds for ZFS aren't pretty, and it doesn't seem the drive manufacturers are going to pull their finger out and release proper firmware any time soon.
I note in the
FreeNAS changelog in the latest version 0.7.2 the minor change "Support Advanced Format 4KB sector. (UFS/GPT data partition only)" is listed, and also, rather confusingly, "Add ZFS pool with 4KB sector support"
I'm pretty set on FreeNAS for my setup, but in light of the 4k sector issue, do you reckon I'd be better off with a UFS RAID 5 (software RAID) array with 4x Samsung F4EG drives? I can't justify the extra cost of the Hitachi drives, but then again I don't have any emotional attachment to ZFS yet.
If I go with UFS software RAID am I going to kick myself down the line?