Clone/Restore ZFS pool to/from an external disk

[kamzata]

I’d like to clone the ZFS rpool/data to an external disk and restore it in case of disk failure.

How should I prepare the external disk and how should I clone and restore the pool?

Edit:

Step 1)

As far I can understand, I can create a new pool with my single external disk running:

zpool create rpool-external /dev/disk/by-id/ata-WDC_WD5000BPVT-22HXZT3_WD-WXK1A9158767

Then my external drive is ready.

Step 2)

The VM and CT drives placed in local-zfs are a zvol, right?

So, if I run:

root@srvlocal1:~# zfs list
NAME                           USED  AVAIL     REFER  MOUNTPOINT
rpool                         4.26G  1.75T       96K  /rpool
rpool-external                 600K   450G       96K  /rpool-external
rpool/ROOT                    2.58G  1.75T       96K  /rpool/ROOT
rpool/ROOT/pve-1              2.58G  1.75T     2.58G  /
rpool/data                    1.67G  1.75T       96K  /rpool/data
rpool/data/subvol-100-disk-0   335M  7.67G      335M  /rpool/data/subvol-100-disk-0
rpool/data/vm-900-disk-0      1.34G  1.75T     1.34G  -

this is the situation.

How can I backup all the rpool/data datasets (rpool/data/subvol-100-disk-0 and rpool/data/vm-900-disk-0) to the rpool-external and restore them if I'm in needed?