On Tue, 2002-01-15 at 13:08, Daniel Pittman wrote: > Maybe Marcello, the 2.4 maintainer, would take a cosmetic patch if you > sent one. :)
Hmmm...maybe... > Given that you are using a laptop harddrive[1], you are /very/ unlikely > to see any real performance difference. Naturally :-) > > Performance on a single hard disk is dominated by seek time for > everything except streaming media. > > Running the data transfer faster, such as UDMA-66 vs UDMA-33, generally > doesn't make a real difference to any situation using IDE disks because > one disk can't saturate the IO bus and two disks still lock each other > out, competing for the bandwidth. > > So, it really doesn't make much difference. If you are using a UDMA, or > even a DMA, mode, there is little gain to be made by pushing it harder. > There is a (miniscule) theoretical gain using DMA over PIO, but it's not > really measurable. > > Enabling 32-bit host transfers and unmasking of the IRQ with hdparm, > when it works[2], can make a difference, though -- especially the later > of those two. Maybe some time when I'm feeling adventurous. Thanks for the info. -- ************** * Simon Wong * **************
