Steven Lowry wrote: > The main problem is my HD performance, it is approx 6x slower than in > windows XP, hopefully there is a solution. I have an LSI Megaraid 8x with > four drives in a raid 5 configuration, in windows I was getting upto 60MB/s > transfer rates but in FBSD I am getting upto 9MB/s. I followed the > instructions in the handbook for tuning disks and I have set dma on. > Being new to unix, I have no idea what to try or get system information > too continue troubleshooting. > If anyone could point me in the right direction or to appropriate > documentation it would be much appreciated.
First, you could try asking the question at performance/at/freebsd.org mailing list - you could get more help there. This reminds me of something I've seen on a box that's also equipped with LSI Megaraid but since disk I/O wasn't important for it, I didn't dig further and forgot about it. Maybe the driver has a problem and people on the performance list can help you. Here's a general checklist of what information to gather before sending it to performance list: * dmesg snippet (like you sent) * copy with "cp" in console, not with KDE and see if it changes anything * run 'iostat' while copying and send results * install and run "bonnie++" (disk I/O benchmark) and send results
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