thanks once again
I have 4 possibilities in the BIOS
nr1 - RAID Autodetect/AHCI (if RAID not detected -> AHCI)
nr2 - RAID Autodetect/ATA (if RAID not detected -> ATA)
nr3 - RAID on
nr4 - SATA/PATA combination mode
I will not consider nr3.
Linux boots only with nr4.
Trying to boot Linux with nr1 or nr2 results in kernel panic.
WinXP boots only with nr1.
Trying to boot WinXP with nr2 or nr4 results in a blue screen with dangerously looking warnings.
nr1 is the factory default so as I got the computer with WinXP installed on it was set to nr1.
following your advise:
-I forget RAID. (I already forgot it, (what was RAID again?, I forgot ;-)))
-there is no setting in the BIOS to disable RAID (i will look for it again) but autodetect is acceptable (nr1 and nr2).
-nr4 is not good
-I stick to a BIOS setting. Since I don't want to reinstall WinXP I will stick to nr1.
-then Linux is not booting
-so what do I do? I reinstall it?
-What was my mistake installing Linux that now I have to change BIOS settings all the time?
-What do I have to do in order to boot without these setting changing? You said I have to reinstall one of the systems if its necessary. How do I know if its necessary? So for example if I reinstall Linux how do I make sure I don't run into the same hole?
-there is no other way but to reinstall?
I just found that somebody else had a similar problem.
It seems not really solved.
Please have a look: