Re: [gentoo-user] Re: dual boot: XP installed last?
On 10/30/06, James [EMAIL PROTECTED] wrote: Neil Bothwick neil at digimed.co.uk writes: If I install XP in the partition and it writes over the MBR, then, upon reboot, how do I get to grub.conf so I have the option to reboot the gentoo, then run grub setup? Run it from the live CD.Ok here's what I did in case anyone else has to do this:Booted up ran a terminal session, when root and issued: grub-install /dev/hdadid not workso I mounted : mkdir /mnt/bootmount /dev/hda2grub-install /dev/hda did not workgrub-install /mnt/dev/hda2 did did not work grub /mnt/dev/hda2 throws me into 'grub'grub root (hd0,1)grub setup (hd0)grub quitreboot Works great!Thanks NeilJames-- gentoo-user@gentoo.org mailing listJust so you know, it's possible to do a grub-install with just a minimal cd, provided your existing gentoo environment works: mount /dev/rootpart /mnt/gentoomount /dev/bootpart /mnt/gentoo/bootmount -t proc none /mnt/gentoo/procmount -o bind /dev /mnt/gentoo/devchroot /mnt/gentoo /bin/bashenv-update source /etc/profile grep -v rootfs /proc/mounts /etc/mtabgrub-install /dev/hda (or whatever your hdd is called)-- - Mark Shields
Re: [gentoo-user] Re: dual boot: XP installed last?
On Tuesday 31 October 2006 18:05, Régis Décamps wrote: On 10/30/06, james [EMAIL PROTECTED] wrote: Allan Spagnol Comar allan.comar at gmail.com writes: you just have to rerun grub setup. H, If I install XP in the partition and it writes over the MBR, then, upon reboot, how do I get to grub.conf so I have the option to reboot the gentoo, then run grub setup? On windows run: fdisk /mbr (or somethink similar I can't recall exactly) The fdisk /mbr is a MSDOS command. I think you mean the more modern command fixmbr and if you run this from a Recovery Console (using your WinXP installation CD) your computer will self-destruct in 3 seconds (only kidding! :) ) What either of these two commands do is write into the MBR the M$Windoze bootloader code. Your Gentoo installation will thereafter be inaccessible without a LiveCD. You can chainload grub from the WinXP ntldr.exe or you can reinstall grub in the MBR. I would recommend the latter, unless you do not intend to keep the linux OS or its /boot partition on this machine. That restores your previous bootloaker, ie grub. Err, no it won't. To restore grub boot using a LiveCD, or a Grub floppy and install grub as per the Gentoo handbook. -- Regards, Mick pgpOQq7xX2qqu.pgp Description: PGP signature
Re: [gentoo-user] Re: dual boot: XP installed last?
You can also backup and and restore the MBR using the Linux dd program available on the Gentoo LiveCD. From http://www.inference.phy.cam.ac.uk/saw27/notes/backup-hard-disk-partitions.html : dd if=/dev/hda of=backup-of-hda-mbr count=1 bs=512 This stores the first 512 bytes of the disk (contianing the MBR and the primary partition info - i.e. the first four primary entries) into the file bcakup-of-hda-mbr which you can then copy to somewhere safe. To restore (be careful - this could destroy your existing partition table and with it access to all data on the disk): dd if=backup-of-hda-mbr of=/dev/hda If you only want to restore the actual MBR code and not the primary partition table entires, just restore the first 446 bytes: dd of=/dev/hda if=backup-of-hda-mbr bs=446 count=1. (Those first 512 bytes are 446 bytes of MBR, then 64 bytes of primary partition table). -- gentoo-user@gentoo.org mailing list
[gentoo-user] Re: dual boot: XP installed last?
Allan Spagnol Comar allan.comar at gmail.com writes: you just have to rerun grub setup. H, If I install XP in the partition and it writes over the MBR, then, upon reboot, how do I get to grub.conf so I have the option to reboot the gentoo, then run grub setup? something like this for my previously shown setup?: grub root (hd0,0)(Specify where your /boot partition resides) grub setup (hd0) (Install GRUB in the MBR) grub quit(Exit the GRUB shell) Do I run grub setup when XP is booted up? Should I use a lived CD to boot up and fix grub? easy and painless is what I had in mind... Not to mention any potential gotchas James -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: dual boot: XP installed last?
On Monday 30 October 2006 18:11, james wrote: Allan Spagnol Comar allan.comar at gmail.com writes: you just have to rerun grub setup. H, If I install XP in the partition and it writes over the MBR, then, upon reboot, how do I get to grub.conf so I have the option to reboot the gentoo, then run grub setup? Boot off a rescue or live cd and reinstall grub from that environment something like this for my previously shown setup?: grub root (hd0,0)(Specify where your /boot partition resides) grub setup (hd0) (Install GRUB in the MBR) grub quit(Exit the GRUB shell) Do I run grub setup when XP is booted up? This won't work - grub-install is a Linux program and it can't run under XP Should I use a lived CD to boot up and fix grub? Yes easy and painless is what I had in mind... LiveCD is easy and painless. However you are reqauired to think and not leave that step up to the machine as some other OS vendors would like you to do :-) Not to mention any potential gotchas If grub was previosuly successfully installed ont he machine there are no gotchas worth mentioning alan James -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: dual boot: XP installed last?
On Mon, 30 Oct 2006 16:11:39 + (UTC), james wrote: If I install XP in the partition and it writes over the MBR, then, upon reboot, how do I get to grub.conf so I have the option to reboot the gentoo, then run grub setup? Run it from the live CD. -- Neil Bothwick What is a free gift ? Aren't all gifts free? signature.asc Description: PGP signature
[gentoo-user] Re: dual boot: XP installed last?
Neil Bothwick neil at digimed.co.uk writes: If I install XP in the partition and it writes over the MBR, then, upon reboot, how do I get to grub.conf so I have the option to reboot the gentoo, then run grub setup? Run it from the live CD. Ok here's what I did in case anyone else has to do this: Booted up ran a terminal session, when root and issued: grub-install /dev/hda did not work so I mounted : mkdir /mnt/boot mount /dev/hda2 grub-install /dev/hda did not work grub-install /mnt/dev/hda2 did did not work grub /mnt/dev/hda2 throws me into 'grub' grub root (hd0,1) grub setup (hd0) grub quit reboot Works great! Thanks Neil James -- gentoo-user@gentoo.org mailing list
