Re: How do I make a boot disk so I can restore Grub?
ANTant_at_zimage.com
Date: 01/25/05
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Date: Tue, 25 Jan 2005 05:57:36 -0600
Bill Unruh <unruh@string.physics.ubc.ca> wrote:
> >Hello. I need to install Windows 2000 SP4 on a second IDE HDD (hdb).
> >Debian (Kernel v2.6.8) and its Grub is already installed on the first
> >HDD (hda). I read that Windows will overwrite the MBR. I was told that
> >I need to make a boot disk so I can restore MBR after Windows
> >installation. How do I make a boot disk and be able to restore Grub on
> >MBR. I hope I am saying this right since it is a bit technical for me.
> ARe you using grub or lilo?
Bill, I am using Grub as noted in my original post. Someone told me to
try lilo, but that didn't work. I don't think I even have lilo command
according to the makeboot command.
> Under lilo, just do
> lilo -b /dev/fd0
> This will write the MBR to the floppy. After you have installed WIndows,
> stick in that floppy and it will allow you to boot to the Linux.
> Ie, it is using the mbr on that floppy rather than the MBR on the hard disk
> hda which has been destroyed by Windows.
> I think you can do the same with grub but I do not know the commands.
> (Looking at the man pages, it would seem to be
> grub-install /dev/fd0
> )
> These procedures do NOT install a kernel onto the floppy. All they do is
> place the appropriate boot loader into the MBA on the floppy. Youwill still
> be booting off of the hard disk /boot directory.
Oh. I thought that would be with Kernel. Interesting.
> For a rescue disk, probably the best thing to use is the installation CD.
Would Sarge's net-installer work? I do not have broadband connection
anymore, but I would like to keep using this old Debian OS.
> >mkboot and lilo didn't work for me:
> ># mkboot
> >Insert a floppy diskette into your boot drive, and press <Return>.
> >Creating a lilo bootdisk...
> >Kernel is at /boot/vmlinuz-2.6.8-1-k7 in /boot
> >Matching initrd image is /boot/initrd.img-2.6.8-1-k7
> >usr/sbin/mkboot: line 93: /etc/lilo.conf: No such file or directory
> >Could not find the requested kernel in your
> > current /etc/lilo.conf .
> >The mkboot script can probably do better.
> >Here is the proposed lilo.conf:
> ># floppy lilo.conf
> > boot = /dev/fd0
> > install = boot.b
> > map = map
> >root = /dev/hda1
> >You can install the boot-loader from this best guess,
> >or you can try to install from a `vanilla\' lilo.conf .
> >Which do you choose? (Enter B for best, V for vanilla): B
> >Installing the best-guess lilo.conf...
> >/usr/sbin/mkboot: line 261: lilo: command not found
> >I was worried so I rebooted the box to see if it even works. Nope, I got
> >"DISK BOOT FAILURE. INSERT SYSTEM DISK AND PRESS ENTER."
> >I can confirm that same boot disk failed in VMware v4.5.1's Windows 2000
> >SP4 guest image on a Windows XP Pro SP2 host machine.
> >Here's my current disk setup:
> >a...@ANTian-AXP ~ =) $ more /etc/fstab
> ># /etc/fstab: static file system information.
> >#
> ># <file system> <mount point> <type> <options> <dump> <pass>
> >proc /proc proc defaults 0 0
> >/dev/hda1 / ext3 defaults,errors=remount-ro 0 1
> >/dev/hda8 /home ext3 defaults 0 2
> >/dev/hda7 /tmp ext3 defaults 0 2
> >/dev/hda5 /usr ext3 defaults 0 2
> >/dev/hda6 /var ext3 defaults 0 2
> >/dev/hda9 none swap sw 0 0
> >/dev/hdb1 /stuff ext3 defaults 0 2
> >/dev/hdb5 /storage ext3 defaults 0 2
> >/dev/hdc /media/cdrom0 iso9660 ro,user,noauto 0 0
> >/dev/fd0 /media/floppy0 auto rw,user,noauto 0 0
> >a...@ANTian-AXP ~ =) $ df
> >Filesystem 1K-blocks Used Available Use% Mounted on
> >/dev/hda1 135468 93213 35028 73% /
> >tmpfs 518288 0 518288 0% /dev/shm
> >/dev/hda8 20121812 2726656 16373024 15% /home
> >/dev/hda7 369000 8244 341096 3% /tmp
> >/dev/hda5 4807056 1871480 2691392 42% /usr
> >/dev/hda6 2885780 475916 2263276 18% /var
> >/dev/hdb1 861728 16432 801524 3% /stuff
> >/dev/hdb5 5336664 558388 4507184 12% /storage
> >ANTian-AXP:/home/ant# /sbin/fdisk /dev/hda
> >The number of cylinders for this disk is set to 3647.
> >There is nothing wrong with that, but this is larger than 1024,
> >and could in certain setups cause problems with:
> >1) software that runs at boot time (e.g., old versions of LILO)
> >2) booting and partitioning software from other OSs
> > (e.g., DOS FDISK, OS/2 FDISK)
> >Command (m for help): p
> >Disk /dev/hda: 30.0 GB, 30003240960 bytes
> >255 heads, 63 sectors/track, 3647 cylinders
> >Units = cylinders of 16065 * 512 = 8225280 bytes
> > Device Boot Start End Blocks Id System
> >/dev/hda1 * 1 18 144553+ 83 Linux
> >/dev/hda2 19 3647 29149942+ 5 Extended
> >/dev/hda5 19 626 4883728+ 83 Linux
> >/dev/hda6 627 991 2931831 83 Linux
> >/dev/hda7 992 1040 393561 83 Linux
> >/dev/hda8 1041 3585 20442681 83 Linux
> >/dev/hda9 3586 3647 497983+ 82 Linux swap / Solaris
> >ANTian-AXP:/home/ant# /sbin/fdisk /dev/hdb
> >Command (m for help): p
> >Disk /dev/hdb: 6448 MB, 6448619520 bytes
> >255 heads, 63 sectors/track, 784 cylinders
> >Units = cylinders of 16065 * 512 = 8225280 bytes
> > Device Boot Start End Blocks Id System
> >/dev/hdb1 1 109 875511 83 Linux
> >/dev/hdb2 110 784 5421937+ 5 Extended
> >/dev/hdb5 110 784 5421906 83 Linux
> >Please note that I am not a Linux/UNIX expert. Debian's Sarge installer
> >set up these partitions for me back in October 2004 since I had no ideas
> >how to configure my partitions. I am still learning my ways in it. Thank
> >you in advance. :)
-- "An ant on the move does more than a dozing ox." --Mexican Proverb /\___/\ / /\ /\ \ Ant @ The Ant Farm: http://antfarm.ma.cx | |o o| | Ant's Quality Foraged Links: http://aqfl.net \ _ / Please remove ANT if replying by e-mail. ( )
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