【发布时间】：2016-08-22 17:19:39
【问题描述】：
我在使用 MariaDB 时遇到了问题，虽然它最初运行良好。当我无法再启动 MySQL 守护进程时，我只重新启动了服务器。它似乎仍在使用我的旧 USB 记忆棒的文件路径 (/media/brood)，而我已经切换到新的硬盘驱动器 (/media/seagate)。这是我在 /var/log/mysql/error.log 中遇到的错误：
160728 9:32:32 [ERROR] mysqld: Can't lock aria control file '/media/brood/mysql/aria_log_control' for exclusive use, error: 11. Will retry for 30 seconds
160728 9:33:03 [ERROR] mysqld: Got error 'Could not get an exclusive lock; file is probably in use by another process' when trying to use aria control file '/media/brood/mysql/aria_log_control'
160728 9:33:03 [ERROR] Plugin 'Aria' init function returned error.
160728 9:33:03 [ERROR] Plugin 'Aria' registration as a STORAGE ENGINE failed.
160728 9:33:03 [Note] InnoDB: Using mutexes to ref count buffer pool pages
160728 9:33:03 [Note] InnoDB: The InnoDB memory heap is disabled
160728 9:33:03 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
160728 9:33:03 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
160728 9:33:03 [Note] InnoDB: Compressed tables use zlib 1.2.8
160728 9:33:03 [Note] InnoDB: Using Linux native AIO
160728 9:33:03 [Note] InnoDB: Not using CPU crc32 instructions
160728 9:33:03 [Note] InnoDB: Initializing buffer pool, size = 128.0M
160728 9:33:03 [Note] InnoDB: Completed initialization of buffer pool
160728 9:33:03 [ERROR] InnoDB: Unable to lock ./ib_logfile0, error: 11
160728 9:33:03 [Note] InnoDB: Check that you do not already have another mysqld process using the same InnoDB data or log files.
160728 9:33:03 [ERROR] InnoDB: Unable to open './ib_logfile0'
160728 9:33:03 [ERROR] Plugin 'InnoDB' init function returned error.
160728 9:33:03 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
160728 9:33:03 [Note] Plugin 'FEEDBACK' is disabled.
mysqld: Too many arguments (first extra is 'stop').
160728 9:33:03 [ERROR] Aborting
160728 9:33:03 [Note] mysqld: Shutdown complete
也可能是权限问题，或者文件仍然被锁定（我不知道这是怎么回事），因为树莓派上次重启是因为有人不小心拔掉了树莓派的电源插头。
【问题讨论】：
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您是如何切换到新硬盘 /media/seagate 的？
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可能是磁盘空间不足，试图构建它需要的临时表。您是否将 tmpdir 设置为单独的小型文件系统？
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@apesa 我只是用相同的文件系统（ext4）格式化了新的硬盘，然后将所有文件（文件夹 htdocs 和 mysql）从 U 盘复制到硬盘，并在 my.cnf我有这条线：
datadir = /media/seagate/mysql.
标签： mysql raspberry-pi locking mariadb