Redis服务器在系统启动时不启动

我在CentOS 6.2上运行了两个不同的REDIS实例，如以下文章所述：

我在/etc/init.d目录下有相应的脚本：

/etc/init.d/redis_6379 /etc/init.d/redis_6380

我还为REDIS实例设置了运行级别：

redis-sentinel  0:off   1:off   2:off   3:off   4:off   5:off   6:off
redis_6379      0:off   1:off   2:on    3:on    4:on    5:on    6:off
redis_6380      0:off   1:off   2:on    3:on    4:on    5:on    6:off

However, when the system reboots, none of the two REDIS instances are starting. I have to enter the system and manually run the startup scripts:

[root]# /etc/init.d/redis_6379 start
[root]# /etc/init.d/redis_6380 start

I checked the log files of REDIS and didn't find any failure.