Re: Cannot access Windows after grub-install /dev/hda1

[Jochen Hoenicke]

On Aug 27, Ian Monroe wrote:
> I have a simular problem as discussed here:
> http://www.mail-archive.com/address@hidden/msg03539.html 
> That message appears to be the last in the thread, though it is hard to
> tell.
> 
> I was stupid and typed 'grub-install /dev/hda1' instead of 'grub-install
> /dev/hda' on my Debian/Windows 98 machine. Windows is on hda, Debian on
> hdb.

>From what you report I would say, some essential fields of the boot
sector were overwritten.  Fortunately there exists a backup boot
sector.  Under linux try this:

# Save the image of the corrupted dos bootsector in case something
# gets wrong:
dd if=/dev/hda1 of=/root/boot.hda1 count=1

# Get the backup bootsector:
dd if=/dev/hda1 of=/root/backupboot.hda1 count=1 skip=6

# Replace boot sector by its backup:
dd if=/root/backupboot.hda1 of=/dev/hda1 count=1

For the same procedure under windows see this:
http://support.microsoft.com/support/kb/articles/Q247/5/75.ASP

  Jochen