On 6/20/06, Ken Cobler <[EMAIL PROTECTED]> wrote: > Wojciech Kromer wrote: > > Dnia 2006-06-19 13:13, Użytkownik Jinesh K J napisał: > > > >> On 6/19/06, Wojciech Kromer <[EMAIL PROTECTED]> wrote: > >> > >> > >>> After reading lot of discusions on this issue, I can't still get > >>> why there is an error booting from root=/dev/sda1 or even root=8:1. > >>> > >>> > > Please append a correct "root=" boot option > > Kernel panic - not syncing: VFS: Unable to mount root fs on > > unknown-block(2,0) > > > > ^^^ Same error with root=8:1 > > > > > >>> and I can mount it after booting the same kernel from network. > >>> > >>> > >>> > >> what does that mean? > >> > >> > >> > > > > The same kernel (binary the same, and no modules loaded) can be loaded > > via network boot, and mounting my usb-storage device is possible. > > From the looks of your posting, the issue is not that you cannot boot > from a USB device, but, rather you cannot mount the root filesystem when > the filesystem is on a USB device. > > I think this issue comes from that fact that even though you have SCSI > emulation for USB devices built into the kernel, the USB device is not > registered with the kernel at the time when the root filesystem needs to > be mounted. Thus, the root filesystem mount fails. > > To get around this problem, I've solved it by building a ramdisk for the > root filesystem. Boot off the USB device, mount the ramdisk (initrd) as > the root filesystem. > > Once the ramdisk is mounted, you can then mount the USB device or the > hard drive. > > Don't forget to add some basic commands to your ramdisk image. >
cool solution. remember that the initrd image is just a gzipped cpio archive. just extract an already existing one and modify the init file in it. add your modules. and rebuild the initrd out of it. i hope i'm right... best of luck... _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
