And here is the content of the superblock for disk2 after booting degraded with disk2 reconnected and disk1 removed and after shutting down (obtained via live cd (note it shows up as vda, not vdb since disk1 is removed)).
And here is the content of the superblock for disk2 after booting degraded with disk2 reconnected and disk1 removed and after shutting down (obtained via live cd (note it shows up as vda, not vdb since disk1 is removed)).