Hard drive IO benchmark software

I intend doing a full round of tests on a 3ware RAID 5 array this week using a variety of OS's (Fedora, CentOS, Redhat 9, etc) and kernels.

What software does everyone recommend to do this?

While on the subject, what software is recommended for general server performance benchmarks?

I'm looking for something that will output readable data which can be compared between the different OS's and kernels.

Thanks.

 

 

 

 

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