ceph mon fail

Is there a way to recover data from OSDs if the monitors and managers don't work anymore but the OSDs still start up? Just for clarification: I don't want to rebuild the cluster I just want to copy data from the OSDs to another HDD.

Hello, I have 4 nodes cluster with 4 ceph mon/mgr. Fourth mon crash after ~5 min. There is logs. root@c1n4:~# /usr/bin/ceph-mon -f --cluster ceph --id c1n4 --setuser ceph --setgroup ceph 2017-12-02 13:29:57.112750 7f8bb16eaf80 -1 mon.c1n4@-1(probing).mgr e212 Failed to load mgr commands: (2) No...