总是报磁盘已满，删除文件失败

[will . happy . willing]

具体日志如下：
2018-09-03 17:53:18 WARN StoreScheduledThread1 - disk space will be full soon, 
but delete file failed.
2018-09-03 17:53:28 INFO StoreScheduledThread1 - physic disk maybe full soon, 
so reclaim space, -1.0
2018-09-03 17:53:28 INFO StoreScheduledThread1 - begin to delete before 24 
hours file. timeup: false spacefull: true manualDeleteFileSeveralTimes: 0 
cleanAtOnce: false
INFO AllocateMappedFileService - /opt/push/rocketmq/store/commitlog mkdir OK
2018-07-31 16:55:51 INFO StoreScheduledThread1 - logics disk maybe full soon, 
so reclaim space, -1.0
2018-07-31 16:55:51 INFO StoreScheduledThread1 - begin to delete before 120 
hours file. timeup: false spacefull: true manualDeleteFileSeveralTimes: 0 
cleanAtOnce: false
2018-07-31 16:55:51 WARN StoreScheduledThread1 - disk space will be full soon, 
but delete file failed.

把所有集群停止后把所有数据都清掉，再启动集群，还是会报这个错误，这个具体可能是什么原因呢？大大们帮忙看一下。