Since there will be no new zfs version for Leopard (the apple developers decided not to split their work because they needed to do changes in the kernel) we were interested what the state of zfs in snow leopard is.

The latest beta version for leopard was 119. The version in snow leopard 10a222 was 130 and in 10a261 it is 145.

Version 119 still had several problems with unmounting volumes, deleting the trash and with spotlight. All these bugs were fixed in version 145.

There even is some support in Disk Utility now. You can’t create pools but you see the slices of the pool and the pool itself.

The internal zfs version still is 8 and every pool created has version 6. OpenSolaris is up to version 14.

Interestingly the zfs.kext is NOT made for PPC, but only for x86 and x86_64 while rest of the system is made for all three architectures.

And don’t get fooled by people saying zfs is not really useful for normal users. Even when you are not using raid/mirror features or snapshots you get a filesystem which tells you when there is corruption in your files and the filesystem itself never (at least that’s what they promise) gets corrupted. That alone makes me totally happy even if I personally will use all the other features too!