[perf-discuss] How to test raw disk IO performance, use /dev/dsk/xxx or /dev/rdsk/xxx?

2008-12-25 Thread guoqingzhu
Hi, can anyone help tell me about this? I want to test my raw disk IO performance using 'dd' or other tools like vdbench. But I don't know which device file should be correct, or both OK. What about the difference between these two file when I do dd to them? In my opinion I think when using /dev

Re: [perf-discuss] How to test raw disk IO performance, use /dev/dsk/xxx or /dev/rdsk/xxx?

2008-12-25 Thread guoqingzhu
Hi, Phil, Thanks a lot for your reply. That benefit me a lot. I will try testing using Filebench. In fact, I mainly want to test the IO performance of device driver and compare it to Linux. So I think the best way is doing this in raw device IO to eliminate effect of filesystems. I also found