请问，xampp, mysql无法启动还可能有什么原因？
已排除：
1.端口被占用问题；
2.默认3306端口并没有被占用；
3.删除xampp\mysql\data\下的ibdata1再重启；
4.没装其他mysql。
多谢。
log如下：
2015-12-04 12:08:16 6772 [Note] Plugin 'FEDERATED' is disabled.
2015-12-04 12:08:16 26b4 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator.
2015-12-04 12:08:16 6772 [Note] InnoDB: Using atomics to ref count buffer pool pages
2015-12-04 12:08:16 6772 [Note] InnoDB: The InnoDB memory heap is disabled
2015-12-04 12:08:16 6772 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
2015-12-04 12:08:16 6772 [Note] InnoDB: Memory barrier is not used
2015-12-04 12:08:16 6772 [Note] InnoDB: Compressed tables use zlib 1.2.3
2015-12-04 12:08:16 6772 [Note] InnoDB: Not using CPU crc32 instructions
2015-12-04 12:08:16 6772 [Note] InnoDB: Initializing buffer pool, size = 16.0M
2015-12-04 12:08:16 6772 [Note] InnoDB: Completed initialization of buffer pool
2015-12-04 12:08:16 6772 [Note] InnoDB: Restoring page 0 of tablespace 0
2015-12-04 12:08:16 6772 [Warning] InnoDB: Doublewrite does not have page_no=0 of space: 0
2015-12-04 12:08:16 6772 [ERROR] InnoDB: space header page consists of zero bytes in data file D:\XAMPP\mysql\data\ibdata1
2015-12-04 12:08:16 6772 [ERROR] InnoDB: Could not open or create the system tablespace. If you tried to add new data files to the system tablespace, and it failed here, you should now edit innodb_data_file_path in my.cnf back to what it was, and remove the new ibdata files InnoDB created in this failed attempt. InnoDB only wrote those files full of zeros, but did not yet use them in any way. But be careful: do not remove old data files which contain your precious data!
2015-12-04 12:08:16 6772 [ERROR] Plugin 'InnoDB' init function returned error.
2015-12-04 12:08:16 6772 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2015-12-04 12:08:16 6772 [ERROR] Unknown/unsupported storage engine: InnoDB
2015-12-04 12:08:16 6772 [ERROR] Aborting
2015-12-04 12:08:16 6772 [Note] Binlog end
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'partition'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_FIELDS'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_INDEXES'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_SYS_TABLES'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_FT_CONFIG'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_FT_DELETED'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_METRICS'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_CMPMEM'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_CMP_RESET'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_CMP'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_LOCK_WAITS'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_LOCKS'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'INNODB_TRX'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'BLACKHOLE'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'ARCHIVE'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'MRG_MYISAM'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'MyISAM'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'MEMORY'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'CSV'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'sha256_password'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'mysql_old_password'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'mysql_native_password'
2015-12-04 12:08:16 6772 [Note] Shutting down plugin 'binlog'
2015-12-04 12:08:16 6772 [Note] d:\xampp\mysql\bin\mysqld.exe: Shutdown complete
解決了。
是權限問題，加everyone完全控制，就好了。如下：
（然而我也想知道為什麼我的D盤有權限問題=。=）
引用stackoverflow上一個和我同樣問題(http://stackoverflow.com/questions/18022809/xampp-mysql -shutdown-unexpectedly)的哥們兒一句話：