def get_raw_reference():
    base_path = '/dev/disk/'
    paths = os.listdir(base_path)
    raw_reference = {}
    for path in paths:
        raw_reference[path] = []
        full_path = base_path + path
        cmd = cmd_utils.Command("ls -l %s" % full_path)
        out, err, rc = cmd.run()
        if not err:
            out = unicodedata.normalize('NFKD', out).encode('utf8', 'ignore') \
                if isinstance(out, unicode) \
                   else unicode(out, errors="ignore").encode('utf8')
            count = 0
            for line in out.split('\n'):
                if count == 0:
                    # to skip first line
                    count = count + 1
                    continue
                line = line.replace("  ", " ")
                raw_reference[path].append(line.split(' ', 8)[-1])
        else:
            logger.log(
                "debug",
                NS.publisher_id,
                {"message": err}
            )
    return raw_reference