On Thu, 9 Nov 2006, David Relson wrote: > Greetings, > > I'm having some USB problems. I'm using BackupPC to perform system > backups to an external hard drive (Maxtor L100P0) in a usb enclosure > (with Cypress Semiconductor usb). A full back is approx 3,100,000 > files totaling 65 GB (compressed to 31 GB) and takes 12 or so hours > during which the USB drivers get a decent workout. > > The first part of this year running Mandriva kernels (2.6.14 and > 2.6.15) all worked well. I switched to Gentoo several months ago. > With its default 2.6.17-gentoo-r7 kernel, the USB subsystem would hang > pretty much every time I ran a full backup. A few weeks ago I > switched to the 2.6.18-gentoo-r1 kernel and backups have been working > quite well, though not 100%, i.e. there's an occasional USB subsystem > hang that requires a reboot to clear. > > I'll be glad to provide additional info if you'll let me know what you > want/need.
To debug this further: Build a kernel with CONFIG_USB_DEBUG turned on. When a hang occurs, make a copy of the kernel log (if the hang is severe enough you may have to echo the log to the console and photograph the screen or use a serial console) and also get a task list dump (Alt-SysRq-T). Alan Stern ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
