Degraded Cluster, some OSDs dont get mounted, dmesg confusion

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Hi,

we have a 144 OSD 6 node ceph cluster with some pools (2 repl and EC).

Today I did an CEPH (10.2.5 -> 10.2.7) and kernel update and rebooted
two nodes.

on both nodes some OSDs dont get mountet and on one node I get some
dmesg like:

attempt to access beyond end of device

Currently the Cluster is replacing and recovering, but I do have a
starnge feeling :)

a) "where" are my missing OSDs (fdisk -l lists them)

b) how to recover or remount or bring the missing OSDs back into the
cluster?

c) what about the message "attempt to access beyond end of device"


Thanks for any hints and suggestions!

    Regards . Götz

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