public boolean shouldAvoid(StoragePool pool) {
      if (_dcIds != null && _dcIds.contains(pool.getDataCenterId())) {
        return true;
      }

      if (_podIds != null && _podIds.contains(pool.getPodId())) {
        return true;
      }

      if (_clusterIds != null && _clusterIds.contains(pool.getClusterId())) {
        return true;
      }

      if (_poolIds != null && _poolIds.contains(pool.getId())) {
        return true;
      }

      return false;
    }
 protected boolean createStoragePool(long hostId, StoragePool pool) {
   s_logger.debug("creating pool " + pool.getName() + " on  host " + hostId);
   if (pool.getPoolType() != StoragePoolType.NetworkFilesystem
       && pool.getPoolType() != StoragePoolType.Filesystem
       && pool.getPoolType() != StoragePoolType.IscsiLUN
       && pool.getPoolType() != StoragePoolType.Iscsi
       && pool.getPoolType() != StoragePoolType.VMFS
       && pool.getPoolType() != StoragePoolType.SharedMountPoint
       && pool.getPoolType() != StoragePoolType.PreSetup
       && pool.getPoolType() != StoragePoolType.OCFS2
       && pool.getPoolType() != StoragePoolType.RBD
       && pool.getPoolType() != StoragePoolType.CLVM) {
     s_logger.warn(" Doesn't support storage pool type " + pool.getPoolType());
     return false;
   }
   CreateStoragePoolCommand cmd = new CreateStoragePoolCommand(true, pool);
   final Answer answer = agentMgr.easySend(hostId, cmd);
   if (answer != null && answer.getResult()) {
     return true;
   } else {
     primaryDataStoreDao.expunge(pool.getId());
     String msg = "";
     if (answer != null) {
       msg =
           "Can not create storage pool through host " + hostId + " due to " + answer.getDetails();
       s_logger.warn(msg);
     } else {
       msg =
           "Can not create storage pool through host "
               + hostId
               + " due to CreateStoragePoolCommand returns null";
       s_logger.warn(msg);
     }
     throw new CloudRuntimeException(msg);
   }
 }