--- In Matthieu Crapet <> wrote:
>
> Hi,
>
> Make sure that your kernel has buildin : usb + usb-storage + fs ext2/3.
>
> RedBoot> load -r -b 0x00218000 -h 192.168.1.48 zImage
> RedBoot> exec -c "console=ttyAM0,115200 root=/dev/sda1 rootwait"
>
> The "rootwait" is important because the /dev/sda1 (which is your usbkey
> is not discovered yet).
>
> I have made recently a debian rootdisk (eabi) for somebody. It's basic
> 144mo.
> http://mcrapet.free.fr/tmp/nfsroot-lenny-20090508.tar.bz2
> Hope it can help.
>
> Regards,
> Matthieu
>
>
Isn't it necessary to provide an initrd with a basic /dev structure ?
Thanks for that image , it could be a useful test tool.
regards.
> wrote:
> >
> >
> >
> > I am trying to boot from a USB key by running the following command:
> >
> > exec -c "console=ttyAM0,115200 root=/dev/sda1"
> >
> > and my error message is:
> >
> > "VFS: Unable to mount root fs via NFS, trying floppy.
> > VFS: Cannot open root device sda1 or unknown-block (2,0)
> > Please append a correct "root=" boot option: here are the available
> > partitions:
> > kernel panic - not syncing: VFS: unable to mount root fs on
> > unknown-block (2,0)"
> >
> > I've created a ext2 partition on sda1 with the debian system on it by
> > executing:
> > > fdisk /dev/sda1
> > >mkfs.ext2 /dev/sda1
> > >mount /dev/sda1 /mnt
> > >tar -C /mnt -xf ./debian-sarge-udev-19-05-2009_backup.tgz
> > >fsck /dev/sda1
> >
> > I wonder if there is something that I have to activate on my kernel
> > configuration to enable booting from USB flash, I am using 2.6.27.4
> > vanilla kernel with Matt's patches.
> >
> > Thanks a million,
> >
> > Magda
> >
> > -
> > -- In <ts-7000%40yahoogroups.com>,
> > Jason Stahls <jason@> wrote:
> > >
> > > s.magda@ wrote:
> > > > I have the exact same problem!
> > > >
> > > > Can anyone help?
> > >
> > > What command line in Redboot are you guys using, and where are you
> > > trying to boot from?
> > >
> > > This,
> > >
> > > Root-NFS: No NFS server available, giving up.
> > > > VFS: Unable to mount root fs via NFS, trying floppy.
> > > > VFS: Cannot open root device "usb0" or unknown-block(2,0)
> > > > Please append a correct "root=" boot option
> > > > Kernel panic - not syncing: VFS: Unable to mount root fs on
> > unknown-block(2,0)
> > >
> > >
> > > Tells you that it was unable to mount the root FS, this is passed to
> > the
> > > kernel from reboot as root=
> > >
> > > --
> > > Jason Stahls
> > >
> >
> >
>
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