MySQL Will Not Start After Specifying Data Directory

  • 7020619
  • 20-Jul-2010
  • 07-Aug-2017


Retain 1.x


After setting the data directory in MySQL, MySQL will not load.  It gives the following error when trying to start MySQL:


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This is a problem with the rights of the folder where the data directory is installed.  MySQL requires that the directory where the database is installed and all files/folders in that directory to have the correct permissions. 

Follow these steps to set the correct permissions:

1) Log in to the Retain Server.

2) Browse to the MySQL Data Directory.

The data directory is where MySQL will keep all of its databases

3) Set the correct ownership.

The owner of the directory of the MySQL database needs to be mysql.  Likewise, the group should be set to mysql. 

Run this command:  chown -R mysql:mysql [/path/data directory]

4) Start MySQL.

Start MySQL:  rcmysql start

Additional Information

This article was originally published in the GWAVA knowledgebase as article ID 1811.