How to migrate data from standard partition to LVM partition (non-root filesystem)?

Solution Verified - Updated -

Issue

  • How to migrate non-root filesystem from standard partition to LVM partition.
  • Is it possible to convert filesystem from standard partitions to LVM2?
  • Currently, a filesystem is on a standard partition which can't resize, hence need to move it to lvm.
  • A requirement to convert an existing non-LVM partition (e.g., /dev/sdb1 mounted on /app) into an LVM-managed volume without data loss.
  • Is it possible to convert a non-LVM partition to an LVM-managed volume without data loss and without service downtime?

Environment

  • Red Hat Enterprise Linux (RHEL)

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