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

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.