On Tue, Oct 04, 2005 at 10:32:32AM -0700, Dan Stromberg wrote: > You may be better off using smart, but if you want to go through all the > blocks in a device without making your load skyrocket, I have two > solutions for you: Thanks Dan. As it happens it rapidly became clear there was some major problem with this machine as even normal tasks sent the load through the roof once they did any significant IO. I rebooted it and now the drives all report 4 times the throughput from "hdparm -t" as they did before. Something I need to investigate. Your "slowdown" tool looks useful though and I will no doubt use it in tandem with dd now, as I don't particularly need those dds to be fast. Thanks to others who took the time to reply also.
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