def disk_busy(device, sample_duration=1):
    """Return disk busy percent."""
    with open('/proc/diskstats') as f1:
        with open('/proc/diskstats') as f2:
            content1 = f1.read()
            time.sleep(sample_duration)
            content2 = f2.read()
    sep = '%s ' % device
    found = False
    for line in content1.splitlines():
        if sep in line:
            found = True
            io_ms1 = line.strip().split(sep)[1].split()[9]
            break
    if not found:
        raise DiskError('device not found: %r' % device)
    for line in content2.splitlines():
        if sep in line:
            io_ms2 = line.strip().split(sep)[1].split()[9]
            break            
    delta = int(io_ms2) - int(io_ms1)
    total = sample_duration * 1000
    return 100 * (float(delta) / total)
dataset/ETHPy150Open cgoldberg/linux-metrics/linux_metrics/disk_stat.py/disk_busy/original