Grub Error 21

[okiwan]

ok so i run ubuntu on my netbook. i put the .iso of BT4 onto a USB drive ran that then installed BT4 onto an SDHC card. at first it wouldnt boot the SDHC card but then for some reason later when i tried it did. but now when i try to boot into ubuntu i get grub error 21.

i search all over the interweb an this seems to be the best result thats close to my problem.

http://www.pendrivelinux.com/grub-error-21...usb-hard-drive/

so i couldnt do it from the ubuntu live cd for some reason it wasnt working. but if i try it from BT4 booted from the SDHC card it seems to work. but then when i restart i still get grub error 21.

please help before i get fed up an reinstall ubuntu and loose all my stuff.

[Sparda]

Have you tried simply reinstalling grub?

[okiwan]

omg thank you. it worked. that was so annoying. i probably overlooked that link because it said after installing windows.