Netapp has an disk & loop stress testing command (in advanced mode) to hammer and load test a filer. This hammer script generates huge I/O operations on the disks – as a result all the disks, storage controllers, loops , CPU and memory gets stressed. Any errors on the system’s hardware configuration can be detected using hammer. Below are the steps to hammer a filer. This can be helpful to stress test new netapp hardware. Allow the hammer to run for 24 hours and make sure the filer doesn’t panic and none of the shelves go offline during hammer. Check for /var/log/messages for any abnormal errors; contact Netapp if you find any.
How to run hammer : http://rajeev.name/blog/2008/09/15/ontap-73-hammer/