On Fri, 14 Nov 2003, Alex Bennee wrote: > On Thu, 2003-11-13 at 21:34, Alan Stern wrote: > > On Thu, 13 Nov 2003, Alex Bennee wrote: > > > 1. Could this a transport problem? I'm using a hacked up version of the > > > ISP116x driver which seems to work in all other respects. Do the > > > WRITE_CMD's and READ_CMD's use the same low level USB transport? > > > > It might be a kind of transport problem. Some devices don't like it when > > commands arrive too quickly. WRITEs and READs do use the same low-level > > transport. > > Is there some way to pace/slow down the commands at the usb level or > should I tweak my transport driver to do that?
Not at the level of usb-storage. Your HCD would have to handle it. > > Nothing springs out of this immediately. The -110 (-ETIMEDOUT) error > > means that the device didn't reply when it was supposed -- from your log > > it looks like the firmware crashed. > > When you say firmware I assume you mean on the USB device itself? Yes. > It makes sense, after an attempt to write sectors the device goes dead > and cannot be read again without unmounting, unplugging and starting > again. However according to the linux-usb compatibility chart most > people don't have a problem with this device so I'm wondering where the > subtle difference is? > > > What happens if you try using Linux 2.6.0? Its USB stack is more robust > > than the one in 2.4. > > Unfortunately not an option. I'm getting this working for a production > embedded system for which 2.6 is just too new to be an option yet. Once > we start shipping version 1 I fully intend to have a go at trying out > 2.6.0, it just doesn't currently line up with our release schedules :-) You could try plugging the device into a standard PC using one of the regular HC drivers. If that works okay, it would definitely point to a problem with your modified driver. Alan Stern ------------------------------------------------------- This SF.Net email sponsored by: ApacheCon 2003, 16-19 November in Las Vegas. Learn firsthand the latest developments in Apache, PHP, Perl, XML, Java, MySQL, WebDAV, and more! http://www.apachecon.com/ _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
