This manifests itself as the following, as reported by lsblk(1). Note
the missing Ceph LVM volume on the 6th NVME disk:
$ cat sos_commands/block/lsblk
NAME
MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda
8:0 0 1.8T 0 disk
|-sda1
8:1 0 512M 0 part /boot/efi
`-sda2
8:2 0 1.8T 0 part
|-foobar--vg-root
253:0 0 1.8T 0 lvm /
`-foobar--vg-swap_1
253:1 0 976M 0 lvm [SWAP]
nvme0n1
259:0 0 1.8T 0 disk
`-ceph--c576f63e--dfd4--48f7--9d60--6a7708cbccf6-osd--block--9fdd78b2--0745--47ae--b8d4--04d9803ab448
253:6 0 1.8T 0 lvm
nvme1n1
259:1 0 1.8T 0 disk
`-ceph--6eb6565f--6392--44a8--9213--833b09f7c0bc-osd--block--a7d3629c--724f--4218--9d15--593ec64781da
253:5 0 1.8T 0 lvm
nvme2n1
259:2 0 1.8T 0 disk
`-ceph--c14f9ee5--90d0--4306--9b18--99576516f76a-osd--block--bbf5bc79--edea--4e43--8414--b5140b409397
253:4 0 1.8T 0 lvm
nvme3n1
259:3 0 1.8T 0 disk
`-ceph--a821146b--7674--4bcc--b5e9--0126c4bd5e3b-osd--block--b9371499--ff99--4d3e--ab3f--62ec3cf918c4
253:3 0 1.8T 0 lvm
nvme4n1
259:4 0 1.8T 0 disk
`-ceph--2e39f75a--5d2a--49ee--beb1--5d0a2991fd6c-osd--block--a1be083e--1fa7--4397--acfa--2ff3d3491572
253:2 0 1.8T 0 lvm
nvme5n1
259:5 0 1.8T 0 disk
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https://bugs.launchpad.net/bugs/1828617
Title:
Hosts randomly 'losing' disks, breaking ceph-osd service enumeration
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