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. Here's is a link to a website that helped me out: http://forums.gentoo.org/viewtopic.php?p=2384956#2384956 Ken Cobler _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
