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

[Chuck Campbell <campbell@xxxxxxxxxxxx>]

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.

-chuck

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