Re: How do I make a boot disk so I can restore Grub?
From: Bill Unruh (unruh_at_string.physics.ubc.ca)
Date: 01/24/05
- Next message: ray: "Re: How do I make a boot disk so I can restore Grub?"
- Previous message: ANTant_at_zimage.com: "How do I make a boot disk so I can restore Grub?"
- In reply to: ANTant_at_zimage.com: "How do I make a boot disk so I can restore Grub?"
- Next in thread: ANTant_at_zimage.com: "Re: How do I make a boot disk so I can restore Grub?"
- Reply: ANTant_at_zimage.com: "Re: How do I make a boot disk so I can restore Grub?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Date: 24 Jan 2005 22:00:42 GMT
ANTant@zimage.com writes:
>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?
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.
For a rescue disk, probably the best thing to use is the installation CD.
>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.
> ( )
- Next message: ray: "Re: How do I make a boot disk so I can restore Grub?"
- Previous message: ANTant_at_zimage.com: "How do I make a boot disk so I can restore Grub?"
- In reply to: ANTant_at_zimage.com: "How do I make a boot disk so I can restore Grub?"
- Next in thread: ANTant_at_zimage.com: "Re: How do I make a boot disk so I can restore Grub?"
- Reply: ANTant_at_zimage.com: "Re: How do I make a boot disk so I can restore Grub?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Relevant Pages
|
