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Mysql failed to connect . can someone give me an idea how to solve it I did the following 

[root@mysrver-01 ~]# sudo service mysql restart
cat: /vol/db1/mysql/mysrver-01.med.edu.pid: Input/output error
MySQL (Percona Server) server process # is not running!    [FAILED]
rm: cannot remove `/vol/db1/mysql/mysrver-01.med.edu.pid': Read-only file system
Starting MySQL (Percona Server)    
[root@mysrver-01 ~]# mysql -u root -p
Enter password: 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
nik
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  • Possible duplicate of [Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)](https://stackoverflow.com/questions/4448467/cant-connect-to-local-mysql-server-through-socket-var-lib-mysql-mysql-sock) – orhtej2 Nov 03 '17 at 19:58
  • This sounds like a OS-level or hardware problem. "IO error" and "Read-only file system" should not normally happen. I don't think this is a programming question hence off-topic. – MarkR Nov 03 '17 at 21:12

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