Samsung 950Pro NvME doesn't cooperate with Samsung 850EVO SSD

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i2w9a2

Commendable
Apr 27, 2016
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(specs) ASUS Maximus Hero mb, i7 6700k cpu, g.skill 16gb 3200 ram, geforce 980Ti gpu, samsung 950Pro NvME m.2 ssd, samsung 850 Evo SSD; latest BIOS update.

Installed the Windows 7 OS on the 850 ssd, installed the NvME driver for 950pro then cloned the OS to 950pro with Windows Magician tool. But I cannot see both drives in My Computer. When I unplug the 850 ssd - computer boots from 950pro m.2; however when I plug the 850 back in - computer boots from 850ssd and does not recognize 950pro m.2 anywhere but the device manager (BIOS doesn't recognize 950pro either). I want the 950pro to be the OS boot and 850evo to be a storage device but cannot seem to get them to work both at same time.

Whoever guides me through this to finish will be gracefully blessed by the old gods and the new!
 
Solution
I
Resolved it by the following methods:

1. Cloned the files from 850Evo to 950PRO M2 ssd using Samsung Data Migration software
2. Before shutting down the system (as prompted), went into Disk Management
3. The 950PRO M2 drive was offline by default (as it is now a replica of 850Evo and so is conflicted) - turned it back ONLINE
4. Renamed the new disk to 950PRO M2 drive, as well as a new volume letter.
5. Reboot into BIOS - Boot order - Windows Boot Manager to be that from 950PRO M2
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Calculagator

Calculagator

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Nov 18, 2014
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I'm not sure if this applies to you, but if you clone a drive too perfectly, it can cause problems. Copying all of the drive exactly may result in both drives having the exact same uuids (or whatever Windows calls the drive ID -maybe GUID?). If you bios or OS uses the uuids to identify a drive, it will only be able to use one at a time.
 
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I

i2w9a2

Commendable
Apr 27, 2016
3
0
1,520


I think you are on the right path here. It seems like Drive (C) is being fought for between 950Pro M2 and the 850EVO ssd. Whenever 850 is plugged in - it rules over the 950 and acts as the boot drive (C). But once I unplug the 850 - 950 stands in its place. So how do I separate the two and make them work together separately?
 
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Calculagator

Calculagator

Admirable
Nov 18, 2014
2,508
1
8,960
I believe you can change a disk id using the diskpart utility, though I don't know if it will allow that on the boot drive. You could perhaps boot from a gparted liveCD or usb and use gparted to create a new mbr for your 850. That will erase it, though. I think there may be a command line utility available from windows recovery that will change a disk's id.
 
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I

i2w9a2

Commendable
Apr 27, 2016
3
0
1,520
Resolved it by the following methods:

1. Cloned the files from 850Evo to 950PRO M2 ssd using Samsung Data Migration software
2. Before shutting down the system (as prompted), went into Disk Management
3. The 950PRO M2 drive was offline by default (as it is now a replica of 850Evo and so is conflicted) - turned it back ONLINE
4. Renamed the new disk to 950PRO M2 drive, as well as a new volume letter.
5. Reboot into BIOS - Boot order - Windows Boot Manager to be that from 950PRO M2
 
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