Re: asdf mousepads...
Elmer called, he'd like his surname back...
Sorry to drag this back, but since no-one pulled you on it, I will.
Never mind what's in wiki, never mind what's on elsewhere, how's about a real live system running ZFS on Linux? There was a little bit more FUD from the BSD switcher, perhaps unintentional, but the functionality is there in Linux. Trust me. Licensing schmisensing, which is the only issue why distros don't include it out of the box.
Four disks in my pool, RAID-Z, not a bit of ECC RAM to be seen and definitely no hardware RAID. I don't give a flying one about best practice since this is my home NAS built from scratch. On a mini ITX board, 6 Gig SATA and one day... those pesky Chinese Seagates all decided to give up in unison (my fault for not checking I was buying from different batches). How much data do you think I lost?
ONE Queen MP3, and it was only Flash Gordon, so I wasn't bothered, especially when it could be ripped again. Admittedly I had to be smart with the disk silvering, get lucky with the SMART status of each disk and replace two at a time with my heart in my mouth.
Oh, is BTRFS STILL not production ready by the way? (Your starter for two: http://stackoverflow.com/questions/22286618/massive-btrfs-performance-degradation, https://btrfs.wiki.kernel.org/index.php/Gotchas, no RAID5/6, wossat?).
I've had more problems trying to run BTRFS than ZFS, sorry to say, but am only pooh-poohing it since someone started on ZFS (can't all us file systems pundits just get along?).
Which by the way, brings us full circle. The Linux it runs on is... Mint!