Move dataset to another zpool in TrueNAS
In Synology, move share folder to another volume is quite easy, can be done via UI interface. In TrueNAS, I could not find such task can be selected.
Duplicate dataset from snapshot
The workable solution is utilize the zfs command to duplicate in SSH environment, then export old pool and import new one.
First make a snapshot
poolX/dataset@initial, then use following command duplicate zfs dataset snapshot to new zpool.
zfs send poolX/dataset@initial | zfs recv -F poolY/dataset
Update new dataset
Then make another snapshot
poolX/dataset@incremental, then use following command update zfs dataset snapshot to new zpool.
zfs send -i initial poolX/dataset@incremental | zfs recv poolY/dataset
Activate new dataset
To make the new dataset usable, rollback snapshot needs to be performed for new dataset.
Change shared point to use new pool.
This is only required if client used server filesystem structure, such as NFS.
Migrate to smaller disk
*Note: pv (Pipe Viewer) command is not installed in TrueNAS by default.