code: def comp_meta(file_bef, file_aft, mode="pfail"):
      
      if env():
          cij.err("cij.nvme.comp_meta: Invalid NVMe ENV.")
          return 1
  
      nvme = cij.env_to_dict(PREFIX, EXPORTED + REQUIRED)
      num_chk = int(nvme["LNVM_TOTAL_CHUNKS"])
  
      meta_bef = cij.bin.Buffer(types=get_descriptor_table(nvme['SPEC_VERSION']), length=num_chk)
      meta_aft = cij.bin.Buffer(types=get_descriptor_table(nvme['SPEC_VERSION']), length=num_chk)
      meta_bef.read(file_bef)
      meta_aft.read(file_aft)
  
      for chk in range(num_chk):
          ignore = ["WL", "RSV0"]
  
          # PFAIL: BEFORE IS OPEN CHUNK, WRITE POINTER IS NOT SURE, IGNORE
          if mode == "pfail" and meta_bef[chk].CS == 4:
              ignore.append("WP")
  
          # COMPARE CHUNK META
          if meta_bef.compare(meta_aft, chk, ignore=ignore):
              cij.warn("META_BUFF_BEF[%s]:" % chk)
              meta_bef.dump(chk)
              cij.warn("META_BUFF_AFT[%s]:" % chk)
              meta_aft.dump(chk)
              cij.err("Error compare, CHUNK: %s" % chk)
              return 1
  
      return 0
docs: Compare chunk meta, mode=[pfail, power, reboot]