USB disk on CS5536 unstable
Hans Petter Selasky
hselasky at c2i.net
Sat Oct 2 14:38:00 UTC 2010
On Saturday 02 October 2010 14:44:07 Anselm Strauss wrote:
> On 09/30/10 21:38, Hans Petter Selasky wrote:
> > On Thursday 30 September 2010 21:10:59 Anselm Strauss wrote:
> >> Maybe sending it to just the USB list was too specific ...
> >> On 09/30/10 00:08, Anselm Strauss wrote:
> >>> Hi
> >>> I have an ALIX board that has an AMD Geode and the CS5536 companion
> >>> chip with integrated USB on it. When I connect a USB disk I have
> >>> observed various problems. For example when I run fsck_ufs on a 250 GB
> >>> partition the process gets stuck in biord state and fsck reports
> >>> unreadable sectors. When I do a dd over the whole disk and direct it
> >>> to /dev/null it suddenly returns with no error, but having read only a
> >>> small fraction of the disk. I tried it with two different disks and
> >>> two different ALIX boards. I'm pretty sure the disks are okay since I
> >>> tried them on other hardware.
> >>> As far as I know there was some trouble with the chip regarding
> >>> timeouts. Under load after some time the USB just stops responding. I
> >>> have tried 8.0 and 8.1. Is there any known problem? How can I track
> >>> this down?
> >>> Anselm
> > If you compile the kernel with USB_DEBUG, then there are some sysctls
> > under hw.usb.ehci which you can tweak. Needs to be set before boot.
> > --HPS
> Did not know that there were configurable bug workarounds in sysctl.
> When I set hw.usb.ehci.lostintrbug=1 in /boot/loader.conf the problems
> seem gone.
> Without this setting I got the following kernel message when dd did abort:
> ehci_timeout: xfer=0xc29cd3c8
Maybe you can report the PCI vendor ID and product so that we can add this
More information about the freebsd-questions