ZFS Failed import of mirror

The main UFS disk on my server died. Attached to the server was also a ZFS mirror with two large disks. I replaced the main disk and reinstalled FreeBSD 10.3. Now I wanted to re-attach the ZFS mirror. Being a ZFS noob, I did:

zpool create data mirror ada2 ada3

Apparently, that was a bad idea because now /data is empty... It seems I should have done zfs import data instead. Is there any way I can regret the operation and get my data back?
I'm afraid you are SoL. You may be able to get some of the files back using a disk recovery tool. Although I don't know one that supports ZFS.