fedora 17 grub error 21

[tonjg]

I've been googling but can't find any solution to this, I can only find stuff about older versions that don't work with F17. I had a new install of fedora 17 desktop on a desktop pc with only one hard drive, now the bootup is stuck saying:
Grub Loading Stage 1.5
Brug Loading, please wait
Error 21

I tried booting from the install DVD into a shell but it doesn't recognize the command 'grub-install'. I also tried the DVD troubleshooting/rescue menu but that didn't work, neither did the diagnostic menu. I also tried the DVD install menu to reload the boot loader, which it did but that didn't work. This is frustrating. I'm hoping there might be a straightforward way to repair this bootloader thing without having to reload my whole system again. Thanks for any pointers.

[glennzo]

Offhand I'd say you have legacy grub installed. Boot with the install DVD again (rescue mode) and do grub2-install /dev/sdx (x being the partition you're booting from).

[tonjg]

thanks for your response, this worked! or more accurately what worked was:
boot dvd to rescue mode
go into a shell
chroot /mnt/sysimage
grub2-install /dev/sda

thanks for your help glennzo

[glennzo]

Yeah. That's what in I meant. You're welcome.