Re-write MBR?

[matulike]

Hi,

 

OK, so I messed up big time. While trying to upgrade my system hard drive - which runs OSX and WinXP - I've had all sorts of problems.

 

I'm now left at the stage where I cant boot any of the original OS's and I dont have an upgraded drive

 

I stupidly, while trying to fix the Win XP installation, re-wrote the MBR on the drive.

 

Now when I try to boot the OS X partition it says ntldr missing press any key to reboot!!! (

 

I'm really unhappy!!!

 

Please help if you can. Can the MBR be re-written with the OS X installer DVD? I couldnt find anything to do it.

 

Thanks.

[matulike]

That a no then?

 

F*%^&ed it havent I??!

 

(

[Neonkoala]

http://neonkoala.co.uk/content/view/33/34/ For reference.

 

Use this command: fdisk -u /dev/rdisk0

[tuxuser33]

Boot off of your DVD.

 

 

Go to --> utilities -->terminal.

 

 

type in without quote and comments; send each input with the enter-key

 

Important: unmount your drive's partitions first; otherwise nothing will be written to disk!

 

"mount" (lists the mounted partitions)

example : umount /dev/disk0s1 (remove mount of first partition of first drive) note the different writings (here without "r")

 

"fdisk -e /dev/rdisk<n> " (where n is the number of your drive-1)

 

"p" (prints a list of your configuration to screen, compare it with your drivelist)

 

"flag <x>" (where x is the number of your partition)

 

"update" (creates the bootcode)

 

"write" (writes the bootcode)

 

"quit"

 

 

"reboot"