LVM devices are not detected automatically, and running LVM specific commands returns no output

Solution Verified - Updated -

Issue

  • System drops in Emergency, since several FS/s fail to mount, as multiple LVM devices time out during boot.
  • LVM devices are not detected anywhere, from maintenance shell.
  • Running LVM specific commands, such as vgs, lvs, etc. returns nothing.
  • Specifying the affected devices in dracut kernel command line options, using rd.lvm.vg=<vgname> or specifically via rd.lvm.lv=<vgname/lvname> works, and all the devices are mounted properly.
  • Only LVM devices specified in the kernel command line are detected and mounted properly.
  • LVM devices could be mounted from rescue as well.

Environment

  • Red Hat Enterprise Linux

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