public DiskBackupStatus backupAllMembers(String targetDirPath, String baselineDirPath) {
    BackupStatus result =
        new BackupOperation(dm, dm.getCache()).backupAllMembers(targetDirPath, baselineDirPath);
    DiskBackupStatusImpl diskBackupStatus = new DiskBackupStatusImpl();
    diskBackupStatus.generateBackedUpDiskStores(result.getBackedUpDiskStores());
    diskBackupStatus.generateOfflineDiskStores(result.getOfflineDiskStores());
    return diskBackupStatus;
  }
@param targetDirPath path of the directory where the back up files should be placed.
@param baselineDirPath path of the directory for baseline backup.
@return open type DiskBackupStatus containing each member wise disk back up status
geode-core/src/main/java/org/apache/geode/management/internal/beans/DistributedSystemBridge.java