Package: mbr
Version: 1.1.11-5
Followup-For: Bug #725417

Control: severity -1 grave

After re-installing windows8 for 3 or 4 times because it stops working
when I install linux to another partition, I figured out it is the mbr
which makes windows being unable to find itself.

I'm not sure wich versions of windows are affected.  Maybe all using the
new (since vista) BCD code, maybe just some.  It definitely affects win8.

The PBR (partition boot record) from M$ looks for the drive with a given
(hardcoded at the PBR installation time) disk-id to find itself.  Once
found, you can boot windows from there, or run recovery or other stuff.

Even booting from a recovery disk and running commonly used tools like
fixboot and fixmbr does NOT recover the broken windows boot.

Restoring the 4 bytes (440..444) with the disk-id field lets windws to
boot again.

This is not "important".  This is a grave issue really, because it breaks
not only unrelated packages in Debian installation, it breaks other
operating system(s) installed, with a very small chance of recovery by
an average user.

Thanks,

/mjt


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