Re: booting with grub to /dev/sda

From: Ow Mun Heng (Ow.Mun.Heng_at_wdc.com)
Date: 01/05/05

  • Next message: Ow Mun Heng: "Re: Fedora on servers" 
    To: For users of Fedora Core releases <fedora-list@redhat.com>
Date: Wed, 05 Jan 2005 12:25:22 +0800

    On Tue, 2005-01-04 at 23:45, Jim Cromie wrote:
    > Ow Mun Heng wrote:
    > >
    > >I believe that what's missing is that you don't have USB support
    > >compiled into the kernel and not as modules.
    > >
    > >I've done it before and it's do-able.
    > >
    > >
    > I should clarify. Ive tried 2 different means to my end.
    >
    > 1. booting my laptop, using grub on hda to pull kernel from sda, and
    > mount it as root.
    > Grub is not seeing the drive, whether thats cuz my laptop BIOS wont show
    > it, OR
    > cuz grub is unable to use it. Naturally, the question is which ?

    One MSG shows you to put sda into device.map. Did you try that already?
    Can your laptop boot directly from USB?

    But I believe that Grub should be able to do it, it's just sort of like
    a pointer that "points" where it should boot from.

    > 2. booting my dads computer directly from the usb-drive (the goal).
    > His box has no grub, but does have a BIOS that will try the usb-drive 1st.
    > EXTLINUX (new in syslinux-3.00) finds the kernel and the initrd, and
    > starts the boot.
    > (it has an automatic menu-system too, with appendable boot-lines)

    So it works then. What's the prob? YOu want #1 too?

    > wrt recompiling, thats sufficient, but not necessary.
    > I used mkinitrd --with=usb_storage to make an initrd with the necessary
    > modules,
    > copied that into where extlinux looks.
    > Now the kernel loads them during boot (so that looks ok),
    > but still fails shortly afterwards (so Im still missing something)

    Hmm..
    >
    > heres the boot error, starting from the initrd module load:
    >
    > Loading jbd.ko module
    > " ext3.ko "
    > " scsi_mod.ko "
    > SCSI subsystem initialized
    > Loading usb-storage.ko
    > Initializing USB Mass Storage driver...
    > usbcor: registered new
    > USB Mass Storage support registered.
    > Creating root device
    > Mounting root filesystem
    > mount: error 6 mounting ext3
    > mount: errort 2 mounting none

    Is this a Typo??

    > Switching to new root
    > switchroot: mount failed: 22
    > umount /initrd/dev failed : 2
    > Kernel panic -not syncing: attempted to kill init
    >
    > hangs.. CtlAltDel doesnt clear it. power cycling does.

    Can you try to mount the initrd image via loopback and look at the
    linuxrc file?? I know it can be done simply with mkinitrd, but I've gone
    the manual part and hacked the linuxrc file. 

    -- 
Ow Mun Heng
Gentoo/Linux on DELL D600 1.4Ghz 
98% Microsoft(tm) Free!! 
Neuromancer 12:21:30 up 3:19, 6 users, 
load average: 0.37, 0.41, 0.38 
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