Should you need to move a ZFS disk from one ZFS pool to another with minimal downtime, you can do so using ZFS snapshots and sending the data/disk from the source to the destination incrementally.
First, start with creating the initial snapshot:
zfs snapshot -r disk-on-pool@snapshot1-r allows for a recursive snapshot
Next, send the initial snapshot to the destination:
zfs send -vRI -- disk-on-source-pool@snapshot1 | cstream -t 1153433600 | ssh -o 'BatchMode=yes' root@destination -- zfs recv -Fu -- disk-on-dest-poolOnce the initial snapshot has been successfully transferred to the new/destination ZFS pool, another snapshot can be made at the source with the following:
zfs snapshot -r disk-on-pool@snapshot2Now for the incremental transfer of snapshots:
zfs send -vRI disk-on-source-pool@snapshot1 disk-on-source-pool@snapshot2 | cstream -t 1153433600 | ssh -o 'BatchMode=yes' root@destination -- zfs recv -Fu -- disk-on-dest-poolShould you wish to make subsequent incremental snapshots and transfers, simply increase the snapshot number (snapshot3, snapshot4 etc) and change the above command as follows:
zfs send -vRI disk-on-source-pool@snapshot1 disk-on-source-pool@snapshot3 | cstream -t 1153433600 | ssh -o 'BatchMode=yes' root@destination -- zfs recv -Fu -- disk-on-dest-poolThis will transfer all snapshots in-between and including the first and last snapshots specified. I.e snapshot1, snapshot2, and snapshot3.