数据库无法启动

你好，

我的WP网站前段时间突然只能访问主页，提示 W3 插件原因就删除了插件，之后访问网站提示数据库连接错误。

检查确认了数据库信息无误，按论坛相关问题检查后发现数据库未启动，找到版主提供的修复代码：

wget -O sql-repair.sh http://download.bt.cn/install/sql-repair.sh && sh sql-repair.sh

运行后还是未启动，以下为运行信息，请问我该如何启动数据库？

[root@c2017112107241 ~]# wget -O sql-repair.sh http://download.bt.cn/install/sql-repair.sh && sh sql-repair.sh
--2018-02-22 09:09:43-- http://download.bt.cn/install/sql-repair.sh
Resolving download.bt.cn... 103.224.251.67
Connecting to download.bt.cn|103.224.251.67|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 19399 (19K) [application/octet-stream]
Saving to: `sql-repair.sh'
100%[======================================>] 19,399 --.-K/s in 0.03s
2018-02-22 09:09:43 (580 KB/s) - `sql-repair.sh' saved [19399/19399]
df: `1518158107.82': No such file or directory
df: no file systems processed
df: `1518158107.82': No such file or directory
df: no file systems processed
ERROR! MySQL server PID file could not be found!
chown: changing ownership of `/www/server/data/c2017112107241.novalocal.pid': Input/output error
Starting MySQL SUCCESS!
==========================================================================================
180222 9:09:46 [ERROR] /www/server/mysql/bin/mysqld: Can't create/write to file '/www/server/data/c2017112107241.novalocal.pid' (Errcode: 21)
180222 9:09:46 [ERROR] Can't start server: can't create PID file: Is a directory
==========================================================================================
mysql start error.
mysql无法正常启动，请将以上错误信息截图发至论坛寻求帮助

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