Re: [linux-usb-devel] Expected performance of Via EHCI with an external USB disk.

2004-12-16 Thread David Brownell
On Sunday 12 December 2004 4:28 pm, Rob Browning wrote: > David Brownell <[EMAIL PROTECTED]> writes: > > > That last point says to me there are some strange timing > > issues lurking. But transfer rates under 10 Mbyte/sec > > have so far seemed best explained by drive adapter issues. > > In case

Re: [linux-usb-devel] Expected performance of Via EHCI with an external USB disk.

2004-12-16 Thread Rob Browning
David Brownell <[EMAIL PROTECTED]> writes: >> If I place an older 5400rpm 20GB Maxtor in the enclosure, create one >> large partition, and then execute "mke2fs -j /dev/uba1", the mke2fs >> command takes 5 minutes or more to run, and the CPU remains pegged at >> 100% throughout. This is on an Athl

Re: [linux-usb-devel] Expected performance of Via EHCI with an external USB disk.

2004-12-16 Thread Rob Browning
David Brownell <[EMAIL PROTECTED]> writes: >> Ahh. I didn't realize there was a choice. What's the proper way to >> manage the selection? Is it just a traditional "make sure you load >> the right module" issue? > > I think you have to actually disable "ub" in Kconfig. > At least, unless/until "

Re: [linux-usb-devel] Expected performance of Via EHCI with an external USB disk.

2004-12-14 Thread Rob Browning
David Brownell <[EMAIL PROTECTED]> writes: > I think you have to actually disable "ub" in Kconfig. > At least, unless/until "ub" starts to talk scatterlists. With usb-storage, the performance is vastly better. The bonnie++ numbers are perhaps 4 to 5 times higher (over 20MB/s in the relevant case

Re: [linux-usb-devel] Expected performance of Via EHCI with an external USB disk.

2004-12-13 Thread David Brownell
On Monday 13 December 2004 8:59 am, Rob Browning wrote: > > > > Sounds like you should use usb-storage instead of "ub". > > Ahh. I didn't realize there was a choice. What's the proper way to > manage the selection? Is it just a traditional "make sure you load > the right module" issue? I think