DRBD version 9 has supported replicating data over multiple paths in an active-backup-like manner since its inception. With multiple paths configured, users can ensure that any single point of failure (SPOF) in a network path is mitigated by adding a second separate path for DRBD to use should the other fail.
TIP: If you’re only interested in resilience, leaving load-balance-paths disabled will result in DRBD only using one path at a time instead of load balancing replicated writes across all configured paths.
It doesn’t work.
if one path failed, another path not working and drbdadm status shows