On 5/27/05, Hans-Werner Hilse <[EMAIL PROTECTED]> wrote: > Jan Drugowitsch <[EMAIL PROTECTED]> wrote: > > On 5/26/05, Hans-Werner Hilse <[EMAIL PROTECTED]> wrote: > > > Do you use the usb-storage driver or the usb block device drive (which > > > mentions things like "slow" and "cpu-hungry" and "unstable" in the > > > kernel config option's help page)? Could you C&P the relevant parts > > > from the kernel logs when the drivers are loaded (USB host adapter and > > > device)? > > > > Here's the kernel log message: > > May 27 01:51:06 rpc-jd224 usb 4-4: new high speed USB device using > > ehci_hcd and address 6 > > May 27 01:51:06 rpc-jd224 uba: device 6 capacity nsec 312581808 bsize 512 > > Yep, this is the slow, polling driver (that OTOH does work with more > devices, AFAIK). Just disabling it (it's in "block devices" kernel > config) as Richard mentioned should solve this. You definately want usb- > storage here, bringing up a SCSI compatibility layer. The disk will > then be recognized as sda instead of uba. CPU usage should drop because > the driver handles the timing issues in a different way, I think.
Ooops, didn't have a look at Device Drivers -> Block Devices. I have no clue why I've once selected 'Low Performance USB Driver'. Anyway, it's now disabled and my writing speed is up to about 16Mb/s. :-) No answer Mark's question: it's an 'Intel Corp. 82801DB USB EHCI Controller', so should be fairly mainstream. Thanks to everyone, Jan -- gentoo-user@gentoo.org mailing list
