InnoDB prints an operating system error
during a file operation, usually the problem has one of the
You did not create the
InnoDB data file
directory or the
InnoDB log directory.
mysqld does not have access rights to create files in those directories.
mysqld cannot read the proper
option file, and consequently does not see the options that
The disk is full or a disk quota is exceeded.
You have created a subdirectory whose name is equal to a data file that you specified, so the name cannot be used as a file name.
If something goes wrong when
InnoDB attempts to
initialize its tablespace or its log files, delete all files
InnoDB. This means all
ibdata files and all
ib_logfile files. In case you have already
InnoDB tables, delete the
.frm files for these tables
.ibd files if you are using multiple
tablespaces) from the MySQL database directories as well. Then you
can try the
InnoDB database creation again. It
is best to start the MySQL server from a command prompt so that
you see what is happening.