[ceph-users] ceph storage pool error

Ceph 3 clusters are running and the 3rd cluster gave an error, it is currently offline. I want to get all the remaining data in 2 clusters. Instead of fixing ceph, I just want to save the data. How can I access this data and connect to the pool? Can you help me?1 and 2 clusters are working. I want to view my data from them and then transfer them to another place. How can I do this? I have never used Ceph before.