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I just installed a new SSD and I want to move all the files from the HDD to my SSD. I cloned the partitions from the hdd to the ssd. I run on a dual boot - windows 10 and ubuntu 15.10. So, now I have the exact same files on the ssd and hdd. What I want to do is change the MBR of the ssd drive and make it the default drive that I boot to.

This is an image of the partitions on the SSD drive: SSD Drive

When I boot right now, it goes to the grub2 that sits on the HDD drive.

What do I need to do in order to boot from the ssd drive and have the grub2 point to the windows partition(/dev/sda2) and linux partition(/dev/sda5) instead of the hdd drive (/dev/sdb*)?

EDIT:

This it the fstab of the new partition: (sda)

# <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sda8 during installation UUID=fa170041-7a3a-487f-8b90-3551fa4c132a / ext4 errors=remount-ro 0 1 # /home was on /dev/sda10 during installation UUID=358504e1-f708-49bf-9c21-c407ab8538a2 /home ext4 defaults 0 2 # swap was on /dev/sda9 during installation UUID=7a87f53e-4f86-4ebb-8a5e-02952d00cf8f none swap sw 0 0 UUID=4CAF-DDF2 /boot/efi vfat defaults 0 1

This it the fstab of the old partition: (was sda and now it is sdb)

# <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sda8 during installation UUID=36e9e347-3000-4771-bfb7-d950b67b1be9 / ext4 errors=remount-ro 0 1 # /boot/efi was on /dev/sda1 during installation #UUID=4CAF-DDF2 /boot/efi vfat umask=0077 0 1 # /home was on /dev/sda10 during installation UUID=358504e1-f708-49bf-9c21-c407ab8538a2 /home ext4 defaults 0 2 # swap was on /dev/sda9 during installation UUID=3443992d-49a2-4687-9e83-4bfa5ddcb7e4 none swap sw 0 0 UUID=4CAF-DDF2 /boot/efi vfat defaults,noauto 0 1

What I can see is that the operating system is booting from the old partition(sdb) but the /home directory is of the new partition(sda). My problem is, how do I make the grub boot on the new operating system

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    Did you try installing rEFInd to replace the default boot loader to one that attempts booting all the available drives? Commented Dec 26, 2015 at 10:51
  • I didn't, but I think that changing the boot manager shouldn't help because what I need is to boot on the right drive(on the right boot manager) Commented Dec 26, 2015 at 11:23
  • Did you check on grub-install <target>? There is a lot of information available. For example dedoimedo.com/computers/grub-2.html#mozTocId232162 gives an explanation on GRUB2. Perhaps a bit out-dated but a nice start. Commented Dec 26, 2015 at 11:35
  • @Marco I tried doing that and it said "cannot find EFI directory". What I can see is that the operating system is booting from the old partition(sdb) but the /home directory is of the new partition(sda). I added the fstab of the old and new partitions that contain the OS. My problem is, how do I make the grub boot on the new operating system.. Commented Dec 26, 2015 at 19:30
  • uninstall grub. install rEFInd. stop wasting your time w/ redundant bootloaders. Commented Dec 26, 2015 at 19:40

4 Answers 4

Reset to default
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I found what my problem was, I changed the efi -(hd0,gpt5) but I didn't change the UUID!!

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Install the boot repair tool and try and use it to configure the boot loader the way you want it

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  • I tried, it didn't help. Please see my edit. Commented Dec 26, 2015 at 19:30
  • Am not sure how this will work on Ubuntu but try grub-install --target=x86_64-efi --efi-directory= $esp --bootloader-id= grub --recheck, Change $esp to your efi partition. Commented Dec 26, 2015 at 20:39
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sudo grub-set-default /media/YOU/YOUR_SSD/boot/grub

or something like this :)

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[You May try booting from a usb stick or running live ubuntu somehow] Try using boot repair >>Advanced Options >> Grub Location this will allow you to write grub on a seperate partition under grub location... enter image description here

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  • OP has noted, 6 years ago, that they solved their issue, which was very specific. Your generic instructions here are not very helpful (try using boot repair). Commented May 25, 2022 at 14:01
  • i thought this solution should be here as a honorable mention I guess :), I keep fixing it the easy way.. editing fstab is also not that hard, but many beginner may mess things up, thus making their main working machine unusable. booting into a separate ubuntu or any debian based linux and then starting boot repair is also another easy solution I guess.. Commented May 27, 2022 at 23:30

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