Not portable? In comparison to which filesytems? I can easily export a ZFS pool on Linux, physically transport the discs to a FreeBSD or IllumOS server and im

Not portable? In comparison to which filesytems? I can easily export a ZFS pool on Linux, physically transport the discs to a FreeBSD or IllumOS server and import the pool. Or to MacOS X, which is also supported (though I haven't tried it unlike the others where it worked perfectly). That's already far ahead of ext, ufs, xfs, jfs, btrfs etc. The only ones offhand which are possibly more portable are fat, hfs, udf and ntfs, and you're not exactly going to want to use them for any serious purpose on a Unix system. ZFS is the most portable and featureful Unix filesystem around at present IMHO.