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I installed a second hard disk to my laptop so that I can test on new Linux distribution without trashing my working one.

I did the following:

  1. Installed Linux Mint 15 to my first drive sda and use it as my working linux
  2. Installed Linux Mint 16 to my second drive sdb and test it
  3. I used sudo update-grub when boot to sda so that I can dual boot the two distributions
  4. since Linux Mint 15 is no longer supported, I did my backup, cloned sdb to sda using Clonzilla
  5. I want to use the sudo update-grub trick again so that I can dual boot both linux mint 16 distributions at sda and sdb.

I went to step 5, but things don't go as expected, if I plugged sdb into my laptop, it automatically boot to sdb, no matter which distribution I choose.

How should I adjust GRUB?

update 01

I have extracted my GRUB info using boot-repair and can be accessed via: http://paste2.org/NG99V4Fs

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  • I'm not very sure, but do you need grub in both the HDs? How was it with Mint 15, in both? ..just curious to know.
    – rusty
    Aug 2, 2014 at 11:55
  • @rusty both sda and sdb have mint 16
    – lokheart
    Aug 2, 2014 at 13:59
  • what did sudo update-grub say?
    – rusty
    Aug 2, 2014 at 14:11

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