Hi!

That's is possible, you just need to shutdown all VMs using disks in there.

Then, 4 steps:
0. Find the PBD currently connected to this SR via xe pbd-list

Save the PBD information somewhere (xe pbd-param-list uuid=<PBD UUID> Unplug and remove the PBD (xe pbd-unplug and xe pbd-destroy Recreate the PBD by just changing the information using xe pbd-create

In short, the PBD is like the "cable" between your host and your SR. Removing it won't remove any actual data, just the link between them. If you recreate it, and replug it, you'll find everything back 🙂