[lug] boot sector backups

Nate Duehr nate at natetech.com
Wed Feb 28 15:20:41 MST 2001

Problem is, the discussion was actually about fsck restoring a master
superblock from one of the copies in the ext2fs partition, not the MBR.

Still useful info, though.  :-)

On Wed, Feb 28, 2001 at 02:50:09PM -0700, D. Stimits wrote:
> Recently someone was asking about boot sector backups, and I knew the NT
> boot loader howto had a means of doing this (as a side-effect), but
> didn't have the URL handy. For those interested, here is the URL:
> http://www.linuxdoc.org/HOWTO/mini/Linux+NT-Loader.html
> Page of relevance:
> http://www.linuxdoc.org/HOWTO/mini/Linux+NT-Loader-5.html
> Sample line that backups a partition boot record for hda2 to file
> bootsect.lnx:
> dd if=/dev/hda2 of=/bootsect.lnx bs=512 count=1
> For "of", you'd want to use a floppy. To restore, "if" would be the
> floppy file, and "of" would be the sector of concern. /dev/hda would be
> MBR, /dev/hda2 would be partition sector of partition 2.
> Does this really work? I think so, but have not tested it...when NT or a
> windows program wipes out the bootsect.lnx file on your NT partition for
> users that have this installed, simply a copy of the file from floppy
> back to NT c:\ fixes it. I have not tried restoring directly to a boot
> record though.
> D. Stimits, stimits at idcomm.com
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Nate Duehr <nate at natetech.com>

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