I set up a ZFS pool of 8 harddrives under FreeBSD 7.2 a couple of years ago. This pool is storing data, the OS itself runs on a separate harddrive with conventional UFS2.
Now I am thinking about upgrading to the latest version FreeBSD 8.2.
Has anyone gone through upgrading ZFS before ? Can I simply export the pool in the 7 installation and then re-import in the new environment ? Or should I expect any complications ?
In other words: Are newer zpool versions backward compatible ?
FreeBSD 8.2 comes with ZFS version 15. I can't seem to find out what version came with 7.2, but IIRC, that was the first major release that supported it all...