docs: def cvtToBlocks(rh, diskSize):
      """
      Convert a disk storage value to a number of blocks.
  
      Input:
         Request Handle
         Size of disk in bytes
  
      Output:
         Results structure:
            overallRC - Overall return code for the function:
                        0  - Everything went ok
                        4  - Input validation error
            rc        - Return code causing the return. Same as overallRC.
            rs        - Reason code causing the return.
            errno     - Errno value causing the return. Always zero.
         Converted value in blocks
      """
  
      rh.printSysLog("Enter generalUtils.cvtToBlocks")
      blocks = 0
      results = {'overallRC': 0, 'rc': 0, 'rs': 0, 'errno': 0}
  
      blocks = diskSize.strip().upper()
      lastChar = blocks[-1]
      if lastChar == 'G' or lastChar == 'M':
          # Convert the bytes to blocks
          byteSize = blocks[:-1]
          if byteSize == '':
              # The size of the disk is not valid.
              msg = msgs.msg['0200'][1] % (modId, blocks)
              rh.printLn("ES", msg)
              results = msgs.msg['0200'][0]
          else:
              try:
                  if lastChar == 'M':
                      blocks = (float(byteSize) * 1024 * 1024) / 512
                  elif lastChar == 'G':
                      blocks = (float(byteSize) * 1024 * 1024 * 1024) / 512
                  blocks = str(int(math.ceil(blocks)))
              except Exception:
                  # Failed to convert to a number of blocks.
                  msg = msgs.msg['0201'][1] % (modId, byteSize)
                  rh.printLn("ES", msg)
                  results = msgs.msg['0201'][0]
      elif blocks.strip('1234567890'):
          # Size is not an integer size of blocks.
          msg = msgs.msg['0202'][1] % (modId, blocks)
          rh.printLn("ES", msg)
          results = msgs.msg['0202'][0]
  
      rh.printSysLog("Exit generalUtils.cvtToBlocks, rc: " +
          str(results['overallRC']))
      return results, blocks