On Sat, 19 Jul 2003, kri wrote: > ooops - sent to wrong adress first, here we go: > > > Your problem sounds very similar to one that came up not too long ago. > > In that case it turned out that the USB-IDE interface was unable to > > handle data flows that were too fast. As more and more data was > > transferred, the interface would just crash and require time-consuming > > error recovery. The transfers just slowed down to a crawl, while > > unwritten buffers filled up the memory. > > Thanks for the information :) > That indeed is not totally unlikely. After a new test I did today, I > noticed that my kernel does indeed not totally crash, but this happens: > The transfer indeed slows down very much, and at some point (with about 2 > MB of Ram left ;) ) it stopped. My drive signaled no more activity. I > could still switch consoles on my linux, but none of them would accept > keyboard input. MagicSysRq Key still worked. > I will compile a 2.6.0-test kernel and try for the rsync and bandwidth > limiting, just to see if that is the problem. > Thanks for the hint. > > Indeed, I just did that(compile and try with rsync), but this does not > really seem to help. It (rsync bandwith throtteling) just slows down the > process, making buffers in memory increase slower. I can see when commands > are sent to the device (which are not a continuing stream, but more like a > series of commands, pausing in between due to the bandwidth limiting. > Maybe I need to lower it a lot more - I tried with rsync and between 50 kb > and 20 kb), seeing it work in turn with those bursts and pausing in > between. > When the transfer begins, for a time nothing happens. I suspect the > buffers of the USB to IDE connector, or of the HDD itself first fill - and > then the commands are sent to the device. :( > Is there anything I could do about it? (heh - maybe I have to learn to > write my own driver... or just sell this stupid thing :( )
You could try configuring usb-storage debugging on in your kernel. The debugging messages will help to show more precisely where your problem comes from. Alan Stern ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
