我已遵循（http://www.datastax.com/documentation/cassandra/2.0/cassandra/install/installAMIConnect.html）的最新指示 并且opscenterd没有运行。 我认为这是因为安装中存在磁盘挂载问题：（〜/ datastax ami / ami.log）
[EXEC] 08/09/14-21:36:58 sudo service opscenterd restart:
* Restarting Cassandra cluster manager opscenterd
...done.
[INFO] Skipping initial configurations.
[INFO] AMI Type: Community
[ERROR] 08/10/14-05:33:24 sudo mount -a:
mount: special device /dev/xvdb1 does not exist