i installed apache and mysql 5.5 on windows 7 64 bit. it worked but today mysql can not start. when i see at error log i find this

120616 16:35:47 [Note] Plugin 'FEDERATED' is disabled.
120616 16:35:48 InnoDB: The InnoDB memory heap is disabled
120616 16:35:48 InnoDB: Mutexes and rw_locks use Windows interlocked functions
120616 16:35:48 InnoDB: Compressed tables use zlib 1.2.3
120616 16:35:48 InnoDB: Initializing buffer pool, size = 103.0M
120616 16:35:48 InnoDB: Completed initialization of buffer pool
120616 16:35:48 InnoDB: highest supported file format is Barracuda.
120616 16:35:50  InnoDB: Operating system error number 1117 in a file operation.
InnoDB: Some operating system error numbers are described at
InnoDB: http://dev.mysql.com/doc/refman/5.5/en/operating-system-error-codes.html
InnoDB: File name .\ib_logfile0
InnoDB: File operation call: 'Windows aio'.
InnoDB: Cannot continue operation.

i search "InnoDB: Operating system error number 1117 in a file operation." and find this link but i cant open mysql site. what is problem? what can i do?

2 Answers 2


from System Error Codes (1000-1299)

1117 (0x45D)
The request could not be performed because of an I/O device error.

It seems that you had a problem with your disks


i find this link. i removed the ib_logfile0 or ib_logfile1 in the data folder and it works. but i don't know what is problem with this log files!


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