unfortunately I had to reinstall Windows cause PartitionMagic bleeped up the MFT of 2 partitions, but I could restore the whole data with "Restorer2000".
At this chance I've changed the whole partitions of my main HDD and reinstalled Windows XP. Now there's a problem: Windows won't boot without the Windows CD! If it's not inserted, there comes the following error: "DISK BOOT FAILURE. INSERT SYSTEM DISK AND PRESS ENTER".
I've tried something else. After installing ubuntu, it writes GRUB into the MBR. But same problem here: GRUB doesn't appear when I reboot. If I try to boot the 1st Harddisk from the ubuntu-CD, there comes the following error:
Booting from local disk isolinux: Disk error 05, AX = 0000, drive 80 Boot failed: press a key to retry...
I've found something in the Ubuntu forums and made a BIOS upgrade, but didn't help.
If I boot from the Windows-CD, GRUB is there and I can boot what I want (Linux, Windows).
Last but not least: I've disconnected the IDE drive for a while and installed Windows XP on one of the SATA drives. Same problem here: It doesn't boot! Only when the CD is inserted and the following boot sequence is configured:
If I swap the 2nd and 3rd the CD boots into the Windows installation.
What could this be? It seems the MBR is corrupted and can't be repaired the normal ways. I've also tried "fixmbr" and "fixboot" without any success and the MBR options of "TestDisk" too.
Please help me! Thanks a lot,