If I install ubuntu with other ubuntu boot drives in the PC, what will happen to them

[sdowney717]

http://www.blogs.digitalworlds.net/softwarenotes/?p=178

here is someone's solution to the same error I get.

No help there.

I did find the problem, but I dont know how to fix it?
The UUID in fstab and gparted are identical for all 3 partitions.

BUT, when it boots, the UUID error 'drive does not exist', shows a UUID that is not related at all to the IDE drive.

So how is grub somehow referencing a UUID that it shoud not, and how to fix it?

I looked through all the drives in gparted, and that uuid is not anywhere that I can find?

I am trying this chroot update grub
http://howtoubuntu.org/how-to-repair...ubuntu-live-cd

No good, still gives a UUID error after chroot and updating grub.
Now the UUID that is missing has changed to a new number.

[oldfred]

Post a new BootInfo report.

Are you sure grub installed to MBR of external drive is the one that is updated and not a partition nor another drive? Or is there some issue that is preventing grub from correctly writing into the MBR of the external drive?

It seems like a grub mismatch.

[sdowney717]

Post a new BootInfo report.

Are you sure grub installed to MBR of external drive is the one that is updated and not a partition nor another drive? Or is there some issue that is preventing grub from correctly writing into the MBR of the external drive?

It seems like a grub mismatch.

Pretty sure, It is sdc and I updated grub to sdc.
What I can do for you is
disconnect all internal drives again.
reboot live usb.
redo boot repair with new Bootinfo report.

Where is it picking up that oddball UUID from?

ok done here it is. will reboot and report back.

Nope still same type uuid error

showing the screen with error

Looking at the uuid in the boot report, this time they match.
So it says the drive does not exist. Why is that? My feeling is the motherboard and this drive?

[oldfred]

I found this in my notes:

ALERT! /dev/disk ... does not exist." error
Boot the machine and go to BIOS configuration (F2) and change:
Advanced -> SATA Controller Mode
from "AHCI" to "Compatibility"
Also check that drive is hd0 and grub in same drive.

AHCI is the prefered mode now. And is required for SSD to use trim as I understand it. But my XP would not boot with AHCI, so I finally turned XP off.

[sdowney717]

Interesting, yes the bios is set to AHCI.

Will change and report back.

Nope, still same error.
turned off AHCI
set to compatable, sata as ide.

I am not too woried right now because I KNOW this drive works with the other main board.
I will know a lot more tommorow when I reinstall with drive attached to that mainboard.

This drive was working fine on this board. I would bring drive home from boat and do updates.
It just will not boot this drive on this board with ubuntu.

this mainboard is Asus P5QC and the IDE drive is WD2000.
I run ubuntu trusty on this board installed with sata II drive just fine.