I recently had a hard drive failure on one server. I decided to merge that server with an existing server (also ISPConfig 3). I don't use ISPConfig for the web sites, as I just hard code the Apache files. I recreated the entries for the mailboxes (which DO use ISPConfig) and copied the RSync backups of the crashed servers /var/vmail directory and the /var/www directory. All was good with mail and web. My problem is with the MYSQL backup. The crashed server was running Mariadb-server and the working server was using mysql-server. I stopped the mysql server, copied in the files from the Rsync backup, and restarted the mysql server. It didn't start....complaining of no socket file. I purged the /var/lib/mysql directory, and copied in all the files from the working server backup (which contained the dbispconfig tables) and then copied in the DB tables again from the crashed server...without the dbispconfig tables, mysql tables and phpmyadmin tables. I restarted the mysql server again, and it started. My problem is a lot of the files read as IN USE in phpmyadmin. In looking at the backups, there are no MYI files, just FRM files in the backup for the working server. I've since upgraded the working server to Mariadb as well. Is there anyway to recover this data?