How to recreate the ext4 superblock and group descriptors, preserving the inodes and data blocks?

Solution Verified - Updated -

Issue

  • How to recreate the ext4 superblock and group descriptors, preserving the inodes and data blocks?

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Ext3 or Ext4 filesystem

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