On Thu, 17 Jul 2003, kri wrote: > Hiya - I thought this mgiht interest you: > I am experiencing low memory and system hang with USB-STORAGE, when I try > to transfer bigger files (~400MB) to a USB HDD. At first everything seems > normal, but then transfer becomes very slow, hangs for some time, > continues, but ultimately system locks up.
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. What helped was to reduce the bandwidth of the transfers by using the -bw option in rsync. You might try that to see if it makes any difference. Also, you could try configuring a kernel with usb-storage debugging turned on. Since all the kernels you tried behaved the same, I would do this with 2.6.0. It will produce a lot of output in the system log, so try just transferring a 20-40 MB file to see if you start getting the slow-downs and if there are errors in the log. 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
