Quoting Lars Schimmer <[EMAIL PROTECTED]>:

I let it run, added root pwd, username,userpwd, deleted the apache
server, added hal, choosed grub in mbr and waited til it was done and
rebooted.
After reboot, it couldn“t mount /root, because "device not found or busy".
I tried it with UUID and with /dev/sda3 in grub....

We've debugged the problem together and found the evil root cause!

It was dmraid!
Dmraid starts an intel fakeraid because there was a valied intel software raid metadata chunk on the disk. We suppose this comes from some stresstesting with Windows from the vendor.

Once found this could easily be corrected.

dmraid -r /dev/sda -E
dmraid -r /dev/sdb -E

The command aborts and prints out a backtrace but netherless it removed the metadata chunk from the disk successfully.

But after this metadata removeal grub won't boot the system anymore, just reinstall it.

mount /dev/sda3 /mnt/sda3
grub-install --root-directory /mnt/sda3 /dev/sda

And everything worked as expected.

cu,
Michael

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