Grub 21 Error

[psyconut713]

i recently tried installing Ubuntu on my flash drive from my main rig, and had a problem with it.

First it said that the installation had failed, so i restarted my PC, when it came up it had an error during the boot proccess, and wont boot into windows.

My raid array had been dismantled , but i rebuilt it, but still wont boot into windows.

The error message is:

Grub stage 1.5
Error 21

How can i fix this, the OS is still there, but it wont let me boot to anything but CD's.

Would the EFI-X help this situation?

[Oberon]

As a temporary solution, you could always overwrite GRUB with the windows boot loader.

[3Z3VH]

Can you still get into GRUB ?

Error 21 is just GRUB's way of saying "You told me to go to this disk, but that disk doesn't exist"... usually it is because the disk is now a different name, like /hdb instead of /hda. If you can get into GRUB, just point it to the proper disk. If not, go into your BIOS and change your hard disk boot order to put the RAID array where it was before. If all of this fails, then you just need to load a new boot loader, be it Windows, or just tossing a new GRUB on there.