Thanks Colin. Missed that line of the doco and/or assumed it was a capability of another file-system.

----- Original Message -----
> Special ioctl doesn't work unless you use directfs (you're using
> ext4); see:
> https://mariadb.com/kb/en/fusionio-directfs-atomic-write-support/
>
> On Wednesday, 11 June 2014, Daniel Black < daniel.black@openquery.com
> > wrote:
>
>
>
> Hi,
>
> I'm trying to get innodb_use_atomic_writes = 1 working on an ext4 on
> top of LVM on a ioDrive device with a RHEL6 kernel
> 2.6.32-358.6.2.el6.x86_64
>
> and getting the following error. Which bit(s) need to change to get it
> working?
>
>
> 140611 7:43:46 InnoDB: Operating system error number 25 in a file
> operation.
> InnoDB: Error number 25 means 'Inappropriate ioctl for device'.
> 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 ./ibdata1
> InnoDB: File operation call: 'ioctl'.
> InnoDB: Error in opening ./ibdata1
>
> --
> --
> Daniel Black, Engineer @ Open Query ( http://openquery.com.au )
> Remote expertise & maintenance for MySQL/MariaDB server environments.
>
> _______________________________________________
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--
--
Daniel Black, Engineer @ Open Query (http://openquery.com.au)
Remote expertise & maintenance for MySQL/MariaDB server environments.

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