sstableloader迁移数据可以把sstable均分到数据磁盘吗

比如我原先是4.5T数据存到5T的raid5上磁盘上

现在考虑性能优化，加强存储

新采购服务器 迁移数据

新服务器上2块900G SSD组raid存commitlog及Cache

# commit log.  when running on magnetic HDD, this should be a
# separate spindle than the data directories.
# If not set, the default directory is $CASSANDRA_HOME/data/commitlog.
# commitlog_directory: /var/lib/cassandra/commitlog
commitlog_directory: /data0/cassandra/commitlog


# saved caches
# If not set, the default directory is $CASSANDRA_HOME/data/saved_caches.
# saved_caches_directory: /var/lib/cassandra/saved_caches
saved_caches_directory: /data0/cassandra/saved_caches

6块8T机械硬盘单独分区存data

# Directories where Cassandra should store data on disk.  Cassandra
# will spread data evenly across them, subject to the granularity of
# the configured compaction strategy.
# If not set, the default directory is $CASSANDRA_HOME/data/data.
# data_file_directories:
#     - /var/lib/cassandra/data
data_file_directories:
      - /data1/cassandra/data
      - /data2/cassandra/data
      - /data3/cassandra/data
      - /data4/cassandra/data
      - /data5/cassandra/data
      - /data6/cassandra/data

现在的疑问就是通过sstableloader迁移数据可以把sstable均分到数据磁盘吗？如果迁移后全部还是堆在了一个硬盘上，那其他5块的读写岂不是暂时发挥不出来