12.04 - Error: no such device grub rescue

Summary:

1. I keep getting the error: no such device grub rescue, after installing 12.04 (erasing an old 12.04 installation beforehand, but using the old /home mount, from a different HDD)




2. I have two HDD 80 GB (used for /) and 250 GB (used for /home)




3. I have tried Boot error > no such device: grub rescue and also using live cd then installing boot-repair, none of them solves the problem.




4. Details from boot-repair: http://pastebin.ubuntu.com/1155292/

Question:

1. I have tried a fresh install several time, and during these times, the two HDD mounted differently. I mean sometimes the 80 GB mounted as sda, sometimes as sdb. is this normal?





2. Do you good guys at the Ask Ubuntu have any other way?