What changes my boot block?

[Robert Nichols]

Jochen Wiedmann wrote:
> Hi,
> 
> I am running a dual boot system with Windows on sda1 and Fedora 8
> Linux on sda3 since quite some time. I am using the standard MBR, Grub
> is installed on the active partition, sda3.
> 
> Recently I noticed that my boot block was defect. There was a possible
> reason why this could happen (upgrade of PGP WDE on Windows), so I
> wasn't overly surprised. No problem, grab the rescue CD reinstalled
> Grub and the system was up again. Windows and Linux were bootable
> again.
> 
> Except that, after I worked the next time on Linux (meaning: the next
> time I did more than simply booting up and shutting down) the same
> thing happened again. Ok, reinstalled Grub, checked that Windows and
> Linux are bootable again and so far so good.
> 
> But finally, after actually working with Linux again today, I found
> myself confronted with a blank screen with the word GRUB in the upper
> left corner again: Third time destroyed boot system in a row.
> 
> Any ideas what's happening?

With GRUB installed on sda3, the boot block code must load stage 1.5
from the filesystem.  If your "work" causes the needed *_stage1_5 file
(probably e2fs_stage1_5) to be moved to different physical sectors on
the disk, then you must reinstall GRUB.

-- 
Bob Nichols     "NOSPAM" is really part of my email address.
                 Do NOT delete it.