Customer has an 2 LMS 2.6 servers :
- Master with RME
- Slave with RME and Campus
He has lost all device from dcr on master, so on slave too.
When we try lsdcr on master we can see that dcr is empty.
How can we get back devices, more that 4000 devices, Backup database is about 25 go.
If all the device has lost due to any reason it is very difficult to track why and there is least options to bring the information, except via Backup Restore.
Also, it seem you're in very old LMS installation which is already EOS, you should plan upgrade.