yes I know, my question is not 100% related to Mandriva, still the
question may be relevant for many of us.
On my laptop I installed (years ago) Mandriva and windowsXP (Windows
on the first partition sda1 of my HD).
I need to reinstall Windows and I seem to remember that the install
process of WinXP does ignore the other partitions present on the HD...
means that my Mandriva partitions would be deleted during the