After executing lvreduce / lvremove / lvresize , how to recover logical volume from backup ?

Solution Verified - Updated -

Issue

  • Recover logical volume or volume group after running:
    • lvreduce
    • lvremove
    • lvresize
  • Accidently ran lvreduce / lvresize before the resize2fs . How can we recover the logical volume ?
  • Accidently removed logical volume, How can I recover it?
  • How can we restore logical volume from its backup?

Environment

  • Red Hat Enterprise Linux 5, 6, 7
  • Red Hat Storage Server 3.X

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