On Thu, May 29, 2003 at 10:00:04AM +0100, Steve Fosdick wrote:
On Thu, 29 May 2003 09:16:39 +0100 "Keith Watson" keith.watson@kewill.com wrote:
Had a play with hdparm last night and my experience was the same as Ian. In fact the settings seemed to be at optimum by default, everything I tried just slowed things down.
I didn't find anything that speeded up the transfer rate as reported by hdparm -t - there was as much variation between any two tests with the same settings as between different settings.
From previous experience the DMA setting is the one that makes a huge
difference in performance - without DMA I get 5Mb/s, with it 25Mb/s. DMA is enabled by default but can get turned off in the event of a DMA timeout.
Generally another major performance increase you will see by enabling DMA is a much lower cpu usage.
Adam