Well, mission accomplished.
Three tools used:
- Clonezilla: after shutdown and connect the new disk, I boot from Clonezilla to clone the existing drive to the empty one
- gParted: i shut down again the server, detached the old drive then booted a live distro with gParted, which allowed extension of XFS partition to fit size of the disk
- Cockpit: from storage manager of cockpit, i was able to extend the size of LVM to fit XFS partition on live use of the server. Unfortunately, xfs do not allow shrinking
As usual, there’s more way to do that.
So… ideas and experiences are welcome.