[PVE-User] Proxmox 5.2, CEPH 12.2.12: still CephFS looks like jewel

[Igor Podlesny]

root at pve-40:~# ceph osd set-require-min-compat-client luminous
set require_min_compat_client to luminous

After enabling CephFS on a single node:

root at pve-40:~# ceph osd set-require-min-compat-client luminous
Error EPERM: cannot set require_min_compat_client to luminous: 1
connected client(s) look like jewel (missing 0x800000000000000); add
--yes-i-really-mean-it to do it anyway

CephFS seems to work just fine, but why this warning occurs at all?

libcephfs2                           12.2.12-pve1

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