s390-dasd assumes all drives are on 0.0. prefix

static int channel_device (const char *i)
{
        unsigned int ret;
        if (sscanf (i, "0.0.%04x", &ret) == 1)
                return ret;
        if (sscanf (i, "%04x", &ret) == 1)
                return ret;
        return -1;
}

And subsequenty assumes that dasd drive must be an integer, and always under 0.0. prefix. In actual fact 1.1. ids could be used too. At least, linux kernel can.