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knb
Asked: 2021-03-04 03:06:01 +0800 CST

lvm: metadata demon deprecated, unavailable in 20.04 and higher?

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The Logical Volume Manager (lvm) metadata daemon seems to be available (and recommended to be in a running state) in Ubuntu up to version 18.04 LTS, but for 20.04 it is not even available

sudo systemctl status lvm<tab> does not list it.

on 20.04:

$ sudo systemctl status lvm2

lvm2-activation-early.service  lvm2-monitor.service
lvm2-activation.service        lvm2-pvscan@8:3.service
lvm2-lvmpolld.service          lvm2.service
lvm2-lvmpolld.socket

but on 18.04:

lvm2-activation.service   lvm2-lvmpolld.service     lvm2-pvscan@8:16.service
====================
lvm2-lvmetad.service      lvm2-lvmpolld.socket      lvm2-pvscan@8:5.service
lvm2-lvmetad.socket       lvm2-monitor.service      lvm2.service
===================

(highlighted by me)

Why? is this documented somewhere?

I can find a forum post on the ArchLinux Wiki, but I'd like to find something more "official". Has lvm2.metad been replaced with something? Or merged?

In Ubuntu 18.84, there is some documentation available on the LVM metadata daemon, but for 20.04 and higher it is not. An equivalent manually-crafted link to 20.04 currently redirectly to 18.04.

18.04

1 Answers

  1. Best Answer

    lvm2.metad was deprecated and finally removed in version 2.03.00: https://github.com/lvmteam/lvm2/blob/master/WHATS_NEW

    Ubuntu removed it with version lvm2 (2.03.01-1): https://launchpad.net/debian/+source/lvm2/+changelog

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