I have a zpool (pool verion 13, FS version 3, called tank0) with about 2.5TB of data in the root of the pool (i.e. directly in /mnt/tank0). OS is FreeBSD, actually FreeNAS version 0.7.2.
I would like to move all of that data to a child filesystem (i.e. one created with zfs create tank0/work) in line with best practice (that I know now).
Not too bothered about keeping the snapshots, but I am bothered about ensuring continual data integrity. I am also space constrained - not enough disk space to just backup and restore to the new location.
Is this possible? Guidance appreciated.