public DiskMetrics showDiskMetrics(String member) throws Exception {
    MemberMXBean bean = validateMember(member);

    DiskMetrics dm = new DiskMetrics();

    dm.setDiskReadsRate(bean.getDiskReadsRate());
    dm.setDiskWritesRate(bean.getDiskWritesRate());
    dm.setTotalBackupInProgress(bean.getTotalBackupInProgress());
    dm.setTotalBackupCompleted(bean.getTotalBackupCompleted());
    dm.setDiskFlushAvgLatency(bean.getDiskFlushAvgLatency());
    dm.setTotalBytesOnDisk(bean.getTotalDiskUsage());
    return dm;
  }
@return list of members hosting servers, which are started from GFSH
geode-core/src/main/java/org/apache/geode/management/internal/beans/DistributedSystemBridge.java