Back on the mailing list for history and for other to help out....
On Thu, 18 Mar 2004 00:05:30 -0500 [EMAIL PROTECTED] wrote: | The host controller version is 2.0 and the kernel version is 2.4.21. and } Sorry, forgot to mention I'm using the UHCI driver. Well, UHCI is a 1.1 host controller interface. For USB 2.0 you need to use the EHCI host controller driver. Actually you need both of them loaded, not just one of them. And there have been lots of kernel (& USB) updates since 2.4.21, including EHCI, so I wouldn't stay on 2.4.21 for very long if USB 2 speeds are important to you. | Jay | | ----- Original Message ----- | From: "Randy.Dunlap" <[EMAIL PROTECTED]> | Date: Wednesday, March 17, 2004 11:27 pm | Subject: Re: [Linux-usb-users] hdparm on USB drive | | > On Wed, 17 Mar 2004 23:15:20 -0500 [EMAIL PROTECTED] wrote: | > | > | Is there any way to enable DMA on an external USB drive? hdparm - | > d won't work. If DMA can't be enabled, are there any similar | > methods for tuning that would allow the same type of performance | > increase? | > | > No, USB disk drives all go thru USB host controller DMA. | > It's not an interface option like it is for IDE/ATA. | > | > Performance depends on USB host controller version, type, and | > kernel version, which you haven't mentioned.... | > | > -- -- ~Randy ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
