I'm a zfs noob so I have to give a big thank you to ilovezfs for the work 
he has done. Using his zfsadm script I was able to install openzfs without 
a hitch (so far).

I installed a zvol formatted to hfs+ on a raidz2 4x2TB zpool which I am 
using as a  timemachine archive (one of two).
It's still early and I haven't stressed the pool but TimeMachine appears to 
working just fine.

Congrats to all the contributors. It looks like progress is being made.

On Tuesday, February 18, 2014 8:33:19 AM UTC-5, jasonbelec wrote:
> Been testing Zvols, HFS+ formatted and Spotlight does seem to like them, 
> which technically means, Mail, iPhoto, etc., etc., can function normally.
> --
> Jason Belec
> Sent from my iPad
> On Feb 18, 2014, at 7:56 AM, ilov...@icloud.com <javascript:> wrote:
> The best description of the current status of the Open ZFS port is here: 
> State 
> of osx.zfs Dec 
> 2013<https://groups.google.com/forum/#!topic/maczfs-devel/h2qA0OpOTvY>
>> Can I use your script to compile and install OpenZFS
> Yes you can use the script to install it, as outlined here 
> http://zerobsd.tumblr.com/post/62586498252/os-x-with-zfs
> maybe even mount the ZEVO pools…
> Yes pool version 5000 is backwards compatible with pool version 28. It is 
> basically pool version 28 plus feature flags: 
> http://open-zfs.org/wiki/Features
> It may be a better idea to start with a fresh pool so that you can take 
> advantage of lz4 compression.
> zpool create -o ashift=13 -O casesensitivity=insensitive -O 
> compression=lz4 -O atime=off -O normalization=formD -f tank …
> If you intend never to replace any of the disks with SSD, ashift=12.
>> and expect it to be stable?
> Yes, it is pretty stable at this point. You might rarely hit a kernel 
> panic or not be able to export the pool with a forced shutdown, neither of 
> which should cause any actual harm to your data.
> I would REALLY like to have features like case insensitivity and UTF8 
>> normalization.
> Yes it has those features.
> Also it would be nice if the mounted filesystems were actually visible in 
>> volumes.
> The default is for the pool foo to mount at /foo, and a dataset foo/bar to 
> mount at /foo/bar. I explained the reason we do not use /Volumes (at least 
> not yet) here: https://github.com/zfs-osx/zfs/issues/64
> Even though foo mounts at /foo not /Volumes/foo, it will still appear as a 
> volume with a disk icon in Finder. Ditto for foo/bar, etc.
> Can I use it for my iPhoto, iTunes and general file storage?
> Yes you can use it for iPhoto, iTunes and general file storage, but do not 
> use it for an entire home directory yet.
> Can it be scanned by Spotlight?
> No Spotlight does not work yet. However, if you want Spotlight, you can 
> use either a sparsebundle or zvol. zvols are not available on ZEVO, so ZEVO 
> users are often unfamiliar with them. Here's a description of their use on 
> Linux:
> http://zfsonlinux.org/example-zvol.html
> The only difference on OS X would be that you'd want to use only -b 512or -b 
> 4096 (our default is 4096), and an HFS+ file system.
> Thank you, if OpenZFS is not an option for everyday use then I will go for 
>> this.
> If you have independent backups, then this is primarily a question of 
> whether you value stability or new features more. If you do not have 
> independent backups, this conversation is moot because your one and only 
> concern should be creating an independent backup of all of your data. By 
> "independent backups," I mean that if every disk in your zpool is tossed in 
> the swimming pool, you still have your data because it is available 
> somewhere entirely separate from your zpool. Ideally, the backup is 
> offsite, or you have both an independent local back and an independent 
> offsite backup.
> Thank you!
> You're welcome.
> -- 
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