Selection, extraction & backup of metadata from a PC

As we all all know that not every information of a Personal Computer is stored in data files, like some information gets stored in the CMOS, etc. So, the complete recovery of a system from its scratch requires the selection, extraction & backup of these as well:

• System description
  A system description, or specifications, is needed to procure an exact replacement after a disaster.
• Boot sector
  The boot sector can sometimes be recreated more easily than saving it. Still, it usually isn't a normal file and the system won't boot without it.
• Partition layout
  The layout of the original disk, as well as partition labels, tables & filesystem settings, is needed to properly recreate the original system.
• File metadata
  Each file's permissions, owner, group, ACLs and any other metadata need to be backed up for a restore to properly recreate the original environment.
• System metadata
  Different operating systems have different ways of storing configuration information. Windows keeps a registry of system information that is more difficult to restore than a typical file, so a backup of the complete registry should also be kept so that it can be restored in case of a disaster.