On Jun 15, 2008, at 10:51 AM, Frank Murphy wrote:
Although you haven't told us "what went wrong" (IE errors, when in the boot process your system fails ect).
I would highly recommend using raid on your /boot partition, this will enable you to boot should you loose a disk, or boot with one disk unplugged for software updates and such (allows a restore point to boot back into the original should the updates / changes break some functionality on your system)
I would imagine that you only wrote to the MBR for one of your disks, and your bios is attempting to boot from the other. If this is the case your bios will report "no operating system installed" or something to that effect.
Enter your bios and change your startup order to boot from the other hard disk. (this process changes depending on bios make and manufacture so I'll leave you to figure it out on your own)
once you boot your OS from the drive where the MBR was written, open a terminal:
you'll then see a grub prompt:
grub> find /boot/grub/stage1
If you're disks are /dev/sda and /dev/sdb do the following to install grub on both:
device (hd0) /dev/sda
device (hd0) /dev/sdb
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