Hi Mathew, 1) We have 2 MDS service running before this nightmare. Now we trying to apply mds on 3 nodes, but all of them will stop within 2 minutes. 2) You are correct. We just add two 10TIB disk to cluster ( which currently have 27 x 4TIB disk), all of them have weight 1.0 About volume recovery and pg backfill full, will volume recovery process finish after pg backfill full process completed ? And do you have Telegram ? If yes, could you pls add my Telegram, +84989177619. Thank you so much _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx