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On Sun, 2 Jan 2005 00:02:02 -0500 Bill Horne <bill at billhorne.homelinux.org> wrote: > Well, I started the New Year off with a bang: I fat-fingered a dd > command and I've overwritten the first 512 bytes of my mbr. > > Before I dig out the backups, please tell me if it's possible to > recreate the MBR from the information in the existing partition labels, > or if there's a backup of the partition table that I can use. You can have GRUB or LILO rebuild your MBR. Boot a rescue CD, a standalone Linux, or boot your installed system from a CD or floppy. If you are using GRUB: If you are booting from a rescue: mount your root file system and chroot it. mount your /boot if separate. Execute the grub shell. Here is an excerpt from the GRUB docs. Once started, GRUB will show the command-line interface (*note Command-line interface::). First, set the GRUB's "root device"(1) (*note Installing GRUB natively-Footnote-1::) to the boot directory, like this: grub> root (hd0,0) If you are not sure which partition actually holds these files, use the command `find' (*note find::), like this: grub> find /boot/grub/stage1 This will search for the file name `/boot/grub/stage1' and show the devices which contain the file. Once you've set the root device correctly, run the command `setup' (*note setup::): grub> setup (hd0) This command will install GRUB on the MBR in the first drive. If you want to install GRUB into the "boot sector" of a partition instead of the MBR, specify a partition into which you want to install GRUB: grub> setup (hd0,0) -- Jerry Feldman <gaf at blu.org> Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9 -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: not available URL: <http://lists.blu.org/pipermail/discuss/attachments/20050102/f2adf292/attachment.sig>
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