On Tue, Jan 18, 2005 at 10:12:55AM -0500, Alan Stern wrote: > On Mon, 17 Jan 2005 [EMAIL PROTECTED] wrote: > > > I've tried setting max_sector low, to 32 or 64k, to no effect. > > Do you mean 32 KB and 64 KB? Or do you mean that you set max_sectors to > 32 (= 16 KB)? Actually, I just want to make sure you have tried setting > max_sectors to something below below 120 (= 61440 bytes) since that's > where you ran into trouble. >
I meant 32k and 64k, assuming I did it right: Plug in device, wait for it to get mapped, then echo 64 > /sys/block/sdb/device/max_sectors The same thing seems to happen. > > I've seen reports about certain USB host controller chips that have small > fluctuations in their clocking rate. Small, but enough to disturb some > devices when running at high speed. I don't remember if the ALi chip was > among the offenders, but it may have been. The recommendation was to buy > a USB 2.0 hub and put it between the controller and the device; the hub > regenerates the clock signals in a clean form that the device can use. Seems like something that would make it not work right in windoze either, but I'll certainly give it a try. > Alternatively and perhaps more easily, you could try replacing your > Cardbus card with a different brand using a different controller. Yeah, that's the obvious solution but it's a pain to keep buying new ones until I find one with a chipset that isn't broken. Do any ALi usb2 devices work? ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
