I'm used (look like more faster)
# lvcreate --type thin-pool -l 100%FREE -Zn thin2/thin2
Thin pool volume with chunk size 1.00 MiB can address at most 253.00 TiB of data.
Logical volume "thin2" created.
the old method
# lvcreate --type thin-pool -l 100%FREE -n thin2 thin2
Thin pool volume...