mysqld Can t change dir to data Server doesn t start

Question

I installed a MySQL server with installer and it started  After reboot I tried to start it again and get the error   D  Program Files MySQL MySQL Server 5 7 bin gt mysqld -u root -p mysqld  Can t change dir to  D  Program Files MySQL MySQL Server 5 7 data        Errcode  2 - No such file or directory  2015-11-17T08 30 18 822962Z 0  Warning  TIMESTAMP with implicit DEFAULT     value is deprecated  Please use --explicit defaults for timestamp server option      see documentation for more details   2015-11-17T08 30 18 822962Z 0  Warning  Insecure configuration for --secure-    file    -priv  Current value does not restrict location of generated files      Consider setting it to a valid  non-empty path  2015-11-17T08 30 18 822962Z 0  Note  mysqld  mysqld 5 7 9  starting as     process 1108     2015-11-17T08 30 18 838586Z 0  Warning  Can t create test file D  Program     Files MySQL MySQL Server 5 7 data DESKTOP-RNBR3E8 lower-test 2015-11-17T08 30 18 838586Z 0  Warning  Can t create test file D  Program     Files MySQL MySQL Server 5 7 data DESKTOP-RNBR3E8 lower-test 2015-11-17T08 30 18 838586Z 0  ERROR  failed to set datadir to D  Program     Files MySQL MySQL Server 5 7 data  2015-11-17T08 30 18 838586Z 0  ERROR  Aborting   2015-11-17T08 30 18 838586Z 0  Note  Binlog end 2015-11-17T08 30 18 838586Z 0  Note  mysqld  Shutdown complete   I tried to reinstall MySQL  UPDATE  When I run mysqld -u root -p as administrator  nothing happens

User · Answer

If you are having this issue and can t find the MySQL service either  just launch  quot MySQL Installer quot  from the Start menu  or download it   then choose  quot Reconfigure quot  on MySQL Server  Follow the steps to set a root user password and then the service will be created and started automatically  and set to auto-start on boot

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First run   mysqld -u root --initialize-insecure    It will create data folder with root as user without password  Then run   mysqld exe -u root --console

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If you installed MySQL Server using the Windows installer and as a Window s service  then you can start MySQL Server using PowerShell and experience the convenience of not leaving the command line   Open PowerShell and run the following command   Get-Service  sql    A list of MySQL services will be retrieved and displayed  Choose the one that you want and run the following command while replacing service-name with the actual service name   Start-Service -Name service-name   Done  You can check that the service is running by running the command Get-Service  sql  again and checking the status of the service

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In my case  I had installed the data directory to a different location   So the data directory really wasn t in the default location   Therefore  when I ran the mysqld command from the command prompt  I had to specify the data directory manually   mysqld --datadir D  MySQLData Data  Here s the documentation for mysqld command-line arguments

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Check your real my ini file location and set --defaults-file  location  with this command  mysql --defaults-file  C  MYSQL my ini  -u root -p   This solution is permanently for your cmd Screen

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remove all files in   path-to-mysql  data  directory and run   mysqld --initialize-insecure --basedir  path-to-mysql  mysql --datadir  path-to-mysql  data --console

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This solution uses the windows mysql installer    I have tried every other way mentioned here and other related posts  but it did not solve my problem  the service just wont start  but the below approach with the mysql-installer did   If you still have your installer or atleast remember the version then follow below steps    Start your windows mysql installer  For me it was  mysql-installer-community-8 0 20 0  Then remove uninstall the SQL Server and remove all configurations Manually delete the SQL Server folder from  C  Program Files MySQL MySQL Server 8 0   Start your mysql installer again and install the SQL Server again   You can check from the window s services that the MySqL Server has started      Hope it helps someone

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In mysql 8 0 13 zip package initializing   Verify that data folder is empty   Under the mysql bin path run mysqld exe --initialize-insecure  Add to my ini native mysql  mysqld  default authentication plugin mysql native password

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I have met same problem  In my case I had no     data dir in my C  mysql  so I just executed mysqld --initialize command from c  mysql bin  directory and I got the data directory in c  mysql data  Afterwards I could use mysqld exe --console command to test the server startup

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When I encountered this same error  I noticed MySQL Configuration file in  C  Program Files MySQL MySQL Server X Y   has changed to my-default ini  I solved it by    Copy my ini from  C  ProgramData MySQL MySQL Server X Y my ini   Paste it in  C  Program Files MySQL MySQL Server X Y my ini  Restart MySQL Server from services msc   In the  ini file  their is part that reads     On Windows you should keep this file in the installation directory    of your server  e g  C  Program Files MySQL MySQL Server X Y   To   make sure the server reads the config file use the startup option     --defaults-file

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mariofertc completely solved this for me here are his steps    Verify mysql s data directory is empty  before you delete it though  save the err file for your records    Under the mysql bin path run  mysqld exe --initialize-insecure add to my ini  mysql s configuration file  the following   mysqld  default authentication plugin mysql native password   Then check services  via task manager  to make sure MySql is running  if not - right click MySql and start it    I ll also note  if you don t have your mysql configuration file in the mysql bin and can t find it via the windows search  you will want to look for it in C  Program Data Mysql   Note that it might be a different name other than my ini  like a template  as Heesu mentions here  Can  39 t find my ini  mysql 5 7  Just find the template that matches the version of your mysql via the command mysql --version

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What I did  Windows 10  for a new installation    Start cmd in admin mode  run as administrator by hitting windows key  typing cmd  right clicking on it and selecting  Run as Administrator  Change into  MySQL Server X Y  directory  for me the full path is C  Program Files MySQL MySQL Server 5 7   using notepad create a my ini with a mysqld section that points at your data directory   mysqld  datadir  X  Your Directory Path and Name   created the directory identified in my ini above  change into bin Directory under server directory and execute  mysqld --initialize Once complete  started the service and it came up fine

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Since you used the Windows installer  everything is set up for you to run MySQL 5 7 as a Windows service  which is a great option in most cases   Instead of running mysqld exe from the command line    Win   R Run services msc Right-click on MySQL57 Start the service

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Check for missing folders that are required by the server  in my case it was UPLOADS folder in programData which was deleted by empty folder cleaner utility that I used earlier   How did I find out   run the server config file my ini in my case it was in programData  as the defaults-file param for mysqld  don t forget to use --console option to view error log on screen   mysqld --defaults-file  C  ProgramData MySQL MySQL Server 8 0 my ini  --console   Error    mysqld  Can t read dir of  C  ProgramData MySQL MySQL Server 8 0 Uploads    OS errno 2 - No such file or directory   Solution    Once I manually created the Uploads folder the server started successfully

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Check that the director exists   If it exists make sure mysql has access rights on it  read write   Can be a good idea to run MySQL as a system process  but not mandatory    If this is stil not working try having the following notation with double slashes  C  WebSerer MySQL data or C  WebServer MySQL data

[mysql] mysqld: Can't change dir to data. Server doesn't start

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