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Question How can I get windows 10 to boot to either original SSD or cloned SSD with error Bootmngr is missing?

hansenjc

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Sep 2, 2012
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I cloned my SSD to a larger SSD on a Windows 10 machine. The cloning process seemed to go well but after it was finished and the computer shut itself down, I tried to boot the computer and neither SSD would boot with an error message that the bootmngr was missing. Attempts to repair it using the Windows 10 ISO have not worked. What might have gone wrong, and how would I repair this? The SATA power and data cables all appear to be properly installed.
 

hansenjc

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If you return the system back to original config, without the new SSD, does it boot up?

What specific SSDs are involved? What motherboard?
No, I have attempted to disconnect the clone and restore the entire system to its original configuration.
The original SSD is a Crucial 250gb and the new SSD is a Samsung 500GB.
The motherboard is a ASUS Z9PE-D8 WS
 

hansenjc

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I have overcome one issue and now have a new one. I was able to boot to Win 10 by issuing some commands from the command prompt. One of those commands failed stating that I did not have permissions.
Now I have Win 10 working but it will not start from the new cloned SSD. I have not tried the original SSD. But this requires that I boot from the DVD.
When trying to boot directly to the new SSD, I get an error PXE-E61: Media test Failure, check cable.
And
PXE-M0F: Exiting Intel Boot Agent
The cables seem to all be correct
I only have the new SSD connected (not the original one. I also have three HDDs connected.
Where do I go from here to finalize this report?
I have tried to 'repair' Win 10 using the DVD, but nothing changes.
 

USAFRet

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Mar 16, 2013
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So the system boots up with only the old drive connected?

If so, redo the clone operation.

-----------------------------
Specific steps for a successful clone operation:
-----------------------------
Verify the actual used space on the current drive is significantly below the size of the new SSD
Download and install Macrium Reflect (or Samsung Data Migration, if a Samsung SSD)
Power off
Disconnect ALL drives except the current C and the new SSD
Power up
Run the Macrium Reflect (or Samsung Data Migration)
Select ALL the partitions on the existing C drive

If you are going from a smaller drive to a larger, by default, the target partition size will be the same as the Source. You probably don't want that
You can manipulate the size of the partitions on the target (larger)drive
Click on "Cloned Partition Properties", and you can specifiy the resulting partition size, to even include the whole thing

Click the 'Clone' button
Wait until it is done
When it finishes, power off
Disconnect ALL drives except for the new SSD
This is to allow the system to try to boot from ONLY the SSD
Swap the SATA cables around so that the new drive is connected to the same SATA port as the old drive
Power up, and verify the BIOS boot order
If good, continue the power up

It should boot from the new drive, just like the old drive.
Maybe reboot a time or two, just to make sure.

If it works, and it should, all is good.

Later, reconnect the old drive and wipe all partitions on it.
This will probably require the commandline diskpart function, and the clean command.

Ask questions if anything is unclear.
-----------------------------
 

hansenjc

Distinguished
Sep 2, 2012
15
0
18,510
0
So the system boots up with only the old drive connected?

If so, redo the clone operation.

-----------------------------
Specific steps for a successful clone operation:
-----------------------------
Verify the actual used space on the current drive is significantly below the size of the new SSD
Download and install Macrium Reflect (or Samsung Data Migration, if a Samsung SSD)
Power off
Disconnect ALL drives except the current C and the new SSD
Power up
Run the Macrium Reflect (or Samsung Data Migration)
Select ALL the partitions on the existing C drive

If you are going from a smaller drive to a larger, by default, the target partition size will be the same as the Source. You probably don't want that
You can manipulate the size of the partitions on the target (larger)drive
Click on "Cloned Partition Properties", and you can specifiy the resulting partition size, to even include the whole thing

Click the 'Clone' button
Wait until it is done
When it finishes, power off
Disconnect ALL drives except for the new SSD
This is to allow the system to try to boot from ONLY the SSD
Swap the SATA cables around so that the new drive is connected to the same SATA port as the old drive
Power up, and verify the BIOS boot order
If good, continue the power up

It should boot from the new drive, just like the old drive.
Maybe reboot a time or two, just to make sure.

If it works, and it should, all is good.toT

Later, reconnect the old drive and wipe all partitions on it.
This will probably require the commandline diskpart function, and the clean command.

Ask questions if anything is unclear.
-----------------------------
Thanks! After reading several articles on the Microsoft forum, I suspected a cable issue. So, I removed all other drives except the new 'cloned' drive and windows boots fine.
Using this same technique of only having one drive present, both the old and the new SSD will boot into Windows 10 without needing to boot through the DVD.
So, I will step through adding all the hard drives one at a time to track down this cable issue.
 

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