Hi Peter,

>From your reply, I see that:

   1. pg 3.12c is part of pool 3.
   2. The osd's in the "up"  for pg 3.12c  are: 6, 0, 12.


I suggest to check on this 'activating' issue do the following:

   1. What is the rule that pool 3 should follow, 'hybrid', 'nvme' or
   'hdd'? (Use the *ceph osd pool ls detail* command and look at pool 3's
   crush rule)
   2. Then check are osds 6, 0, 12 backed by nvme's or hdd's? (Use *ceph
   osd tree | grep nvme *command to find your nvme backed osds.)


If your problem is similar to mine, you will have osds that are nvme backed
in a pool that should only be backed by hdds, which was causing a pg to go
into 'activating' state and staying there.

Cheers,
Tom
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