Home > Storage > PowerStore > Data Protection > Dell PowerStore: Metro Volume > Communication flow – fracture
If PowerStore detects a communication problem with its peer system (due to missing TTL request or grant), a fracture request is sent to the witness for each Metro Volume session, with a short delay from the non-preferred side. Whichever request is received first will be declared as the winner and the losing request, if received by the witness, will receive an error. The declared winner continues to serve read and write host I/O and the loser will demote itself.