InnoDB: Page lsn 7 3803765998, low 4 bytes of lsn at page end 3803751733
InnoDB: Page number (if stored to page already) 12121,
InnoDB: space id (if created with >= MySQL-4.1.1 and stored already) 0
InnoDB: Page may be an index page where index id is 0 42
InnoDB: Also the page in the doublewrite buffer is corrupt.
InnoDB: Cannot continue operation.
InnoDB: You can try to recover the database with the my.cnf
InnoDB: option:
InnoDB: innodb_force_recovery=6
150308 09:43:50 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended




also i dont have backup for my database and i dont want to lose any data its to emergency !!
what i can do ???
Thanks

Have you tried forcing a recovery by adding innodb_force_recovery = 1 to the mysqld section of your conf file?

Also, not having a backup of your database may cause you to have data loss if a recovery does not work.

adding innodb_force_recovery = 1>5
not make it start
but when i put innodb_force_recovery = 6
the error in log changed


150308 13:42:43 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
/usr/libexec/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
150308 13:42:43 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
150308 13:42:43 InnoDB: Initializing buffer pool, size = 8.0M
150308 13:42:43 InnoDB: Completed initialization of buffer pool
InnoDB: The user has set SRV_FORCE_NO_LOG_REDO on
InnoDB: Skipping log redo
150308 13:42:43 InnoDB: Started; log sequence number 0 0
InnoDB: !!! innodb_force_recovery is set to 6 !!!
150308 13:42:43 [ERROR] /usr/libexec/mysqld: Can't find file: './mysql/host.frm' (errno: 13)
150308 13:42:43 [ERROR] Fatal error: Can't open and lock privilege tables: Can't find file: './mysql/host.frm' (errno: 13)
150308 13:42:43 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended

---------- Post added 03-07-15 at 08:43 PM ----------

adding innodb_force_recovery = 1>5
not make it start
but when i put innodb_force_recovery = 6
the error in log changed


150308 13:42:43 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
/usr/libexec/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
150308 13:42:43 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
150308 13:42:43 InnoDB: Initializing buffer pool, size = 8.0M
150308 13:42:43 InnoDB: Completed initialization of buffer pool
InnoDB: The user has set SRV_FORCE_NO_LOG_REDO on
InnoDB: Skipping log redo
150308 13:42:43 InnoDB: Started; log sequence number 0 0
InnoDB: !!! innodb_force_recovery is set to 6 !!!
150308 13:42:43 [ERROR] /usr/libexec/mysqld: Can't find file: './mysql/host.frm' (errno: 13)
150308 13:42:43 [ERROR] Fatal error: Can't open and lock privilege tables: Can't find file: './mysql/host.frm' (errno: 13)
150308 13:42:43 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended

using innodb_force_recovery = 6
now i see a lot


InnoDB: mysqld and edit my.cnf so that newraw is replaced
InnoDB: with raw, and innodb_force_... is removed.
InnoDB: A new raw disk partition was initialized or
InnoDB: innodb_force_recovery is on: we do not allow
InnoDB: database modifications by the user. Shut down
InnoDB: mysqld and edit my.cnf so that newraw is replaced
InnoDB: with raw, and innodb_force_... is removed.
InnoDB: A new raw disk partition was initialized or
InnoDB: innodb_force_recovery is on: we do not allow
InnoDB: database modifications by the user. Shut down
InnoDB: mysqld and edit my.cnf so that newraw is replaced
InnoDB: with raw, and innodb_force_... is removed.
InnoDB: A new raw disk partition was initialized or
InnoDB: innodb_force_recovery is on: we do not allow
InnoDB: database modifications by the user. Shut down
InnoDB: mysqld and edit my.cnf so that newraw is replaced
InnoDB: with raw, and innodb_force_... is removed.
InnoDB: A new raw disk partition was initialized or
InnoDB: innodb_force_recovery is on: we do not allow
InnoDB: database modifications by the user. Shut down
InnoDB: mysqld and edit my.cnf so that newraw is replaced
InnoDB: with raw, and innodb_force_... is removed.
InnoDB: A new raw disk partition was initialized or
InnoDB: innodb_force_recovery is on: we do not allow
InnoDB: database modifications by the user. Shut down
InnoDB: mysqld and edit my.cnf so that newraw is replaced
InnoDB: with raw, and innodb_force_... is removed.

Before you do anything next, take a proper backup of your data!

!!!STOP DOING ANYTHING UNTIL YOU KNOW WHAT EFFECT IT WILL HAVE!!!

You have probably already lost data... from the MySQL Manual...

Read that page in full before continuing...

Make a filesystem backup of the data directories before doing anything else - that will be your only recovery path beyond this point I think.