Yes, that's pretty much it 🙂 Then, if your old master is dead for good (ie reinstall needed), you need to "forget" it (ie it will be removed from the database).

it's pretty simple because XAPI is replicated to all pool member while the master is running (but all other members got it in read only). If the master dies, then promote another member and you are done.

@Danp said in Patching and trying to Pool Hosts after they've been in production:

Warm migration should work in this case because the VM is halted then restarted as part of the process. See here for more details.

Sweet, I'll setup something small on the old host for testing and use the Warm Migration process.