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windows mbr or boot loader on the wrong drive?

post #1 of 13
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So i been noticeing this which been over a year now. I have windows 10 and if i have the boot order in bios set to my ssd which windows is installed i get a blue screen with a message saying os is not installed... But on another hdd i have in my system which is a 2tb samsung with no os installed just backups if i select that before boot up windows will load normal...

Not sure how this happened... But if have the ssd ony connected it will not boot windows but windows 10 is indeed on that drive.

Is there a way i can change it back on the ssd?
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post #2 of 13
When you install Windows, whatever drive is set as the boot device (in the BIOS) gets the "boot loader" installed onto it.

You can put the Windows folder on any drive or partition that you want. Most people thing that when they "install to" a drive or partition, then that becomes the boot drive. No, it's not, it's just the drive with the Windows folder on it.

If you have an SSD as the boot device and the Windows folder on a spinner drive, well, it kind of defeats the while idea of the SSD providing fast booting. All the windows programs and drivers have to be loaded off of the spinner. And, if either drive fails Windows won't boot.

Microsofts BCDEdit (included with Windows) or the much easier to use EastBCD can fix that for you.
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post #3 of 13
Thread Starter 
Quote:
Originally Posted by billbartuska View Post

When you install Windows, whatever drive is set as the boot device (in the BIOS) gets the "boot loader" installed onto it.

You can put the Windows folder on any drive or partition that you want. Most people thing that when they "install to" a drive or partition, then that becomes the boot drive. No, it's not, it's just the drive with the Windows folder on it.

If you have an SSD as the boot device and the Windows folder on a spinner drive, well, it kind of defeats the while idea of the SSD providing fast booting. All the windows programs and drivers have to be loaded off of the spinner. And, if either drive fails Windows won't boot.

Microsofts BCDEdit (included with Windows) or the much easier to use EastBCD can fix that for you.


The thing is nothing is on the spinner drive just backups and games. windows etc is all on the ssd. It just seems like its looking for the spinner drive on boot up even tho there is nothing on it for windows.


This seems like it all happen when windows 10 upgrade took place or a bit after, Cause on windows 8.1 i never had this issue.


heres what bcdedit shows in cmd Shows d: and shows bootmanager from it looks to me the boot manager is somewhere on the spinner drive?


Edited by gordesky1 - 4/26/17 at 12:02am
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post #4 of 13
BCDedit is the most straightforward fix, but not simple. You could also try copying the partition with windows root directory on it (the C:) over to the mbr (D:) drive, in a second partition made AFTER the master boot partition (make it partition"c", rename the other drive *for now*) - and, then ghosting/cloning the spliced windows drive back over to the old C: drive. This *may* require editing of system.ini or boot.ini to point to the C:? drive, 01 (2nd) partition, i dont know, and thats when my method gets just as hairy as BCDedit.

If i thought the newer recovery tools were anywhere as useful as the xp recovery console, id be telling you to run fixboot and fixmbr.
post #5 of 13
Thread Starter 
What about if i run windows 10 repair with out the spinner drive connected? would that work? Than again im not sure if i can do that unless i used a flash drive with window 10 on it.
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post #6 of 13
if you disconnected the D: drive with the mbr on it, you would have the c drive with the windows root directory and the recovery manager on it. you may have to boot from a windows 10 cd into recovery mode to access it, because, usually that partition is accessed thru the mbr, by pressing f8- well, in older windows. You could try booting with d unhooked, and see if the recovery kicks in, but i think you will have to run it from cd, and im not sure if the windows 10 startup/repair tools are adequate. BCDedit or splice the drives with copy/paste/ghost/clone seems the most viable options- the ones i know will work.
post #7 of 13
Thread Starter 
Going to give the startup/repair a try first hopefully that does it. worth a shot.
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post #8 of 13
It's often recommended to only connect the OS drive to the PC when you first install Windows. Reason being, if more than one drive is connected Windows likes to write the system reserved partition to the secondary drive, which was actually first in boot priority instead of the SSD (designated OS drive).

If that was the case when you installed Windows, you might want to try making an image backup of your SSD's C:\ partition to an external drive. Then disconnect the 2TB drive from the motherboard and reinstall Windows to the SSD. That way the system reserved partition will be written to the SSD, the only drive that's connected.

Afterward, maybe you can restore the image of your previous C:\ to the clean install partition. I really don't know if this will work as I've never tried it. Again, you'd only want to copy over the c:\ volume, not any other partition that was previously on the SSD. If successful, you would then connect your 2TB storage drive and delete the boot partition on it (if there is one?).

I'm just thinking out loud and am only suggesting this as one "last resort" possibility if there isn't another more elegant way to somehow move your boot partition to the SSD. Please don't rush into doing what I wrote above without a little more planning and research first. smile.gif

edit - maybe a screenshot of your Disk Management would be useful.
Edited by btmaffo - 4/26/17 at 12:19pm
post #9 of 13
it will work, as long as its a vanilla copy of the exact same flavor of windows you are restoring over.
post #10 of 13
YES WINDOWS IS STUPID SINCE FOREVER, install mbr in any other drive but the drive you are installing windows

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