On 18.07.2007 12:23, Justin Piszcz wrote:
I am sure one of your questions is, well, why use SW RAID5 on the controller? Because SW RAID5 is usually much faster than HW RAID5, at least in my tests:
Though that's no answer to your question, I really can't confirm that. I'm running a 3Ware 9650 with 8x 7200 SATAs in HW RAID 6. Writes are between 340-360MB/sec and reads peak at 430-450MB/sec. That seems to be the absolute possible maximum those drives can deliver. The card even seems to do some really smart stuff, as the read speed is in excess of the physical raw speed of 6 drives.
You have done the usual settings, 3Ware recommends? echo 64 > /sys/block/sda/queue/max_sectors_kb echo 512 > /sys/block/sda/queue/nr_requests echo "deadline" > /sys/block/sda/queue/scheduler blockdev --setra 16384 /dev/sdX Have you set the correct su,sw options for XFS? -- Regards, Hannes Dorbath - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
