Re: slow i/o with a raid 50 on a 3ware controller

[Markus Falb <markus.falb@xxxxxxxx>]

On 6.8.2014 20:44, Chuck Campbell wrote:
> I have a raid 50 array on a 3ware controller. The box is running centos 6.5 and 
> the file system is ext4.
> 
> I'm going to try some other filesystems, but could anyone suggest any 
> alternative raid setups as well as stripe sizes I should try?
> 
> The old server uses the same controller on a centos 5.10 setup, using ext3, and 
> it performs much faster i/o. The old 3ware setup is raid 5.

Do you have barriers enabled?
Just another shot in the dark, but 5 didn't have that.
If you have battery backed Cache with your Controller, you can safely
disable barriers anyway.

-- 
Kind Regards, Markus Falb

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