I'm relatively new to the SSD business and never had to worry about those things, so forgive me if I get something wrong from time to time. So, recently I bought a new SSD and I only had an old HDD before. I used the Samsung Data Migration tool to transfer Windows and other programs and data onto my SSD. This was very troublesome already because of several reasons. I managed to transfer it finally after defragging my old HDD.
So, after the transfer I hooked up my SDD via SATA and I seem to have forgotten to plug in the HDD. So far so good. I booted up my system, it works and is very fast. I noticed I didn't have access to my HDD but I thought I'd fix it later. So later, I looked into my case and saw the SATA cable was not connected. I plugged it in and wanted to boot; but: Bootmgr is missing.
I then tried several things in UEFI/BIOS (nothing worth mentioning I think though) and nothing worked. I could boot up from my HDD though. I googled this error and found things like using Bootrec, which I tried using after downloading the Windows 10 ISO on my USB stick. Result: Bootmgr is missing from both HDD and SDD (that might be my fault though, I unplugged the HDD now). In any case, I tried to use Bootrec /rebuildbcd among the other options and the command prompt then promisingly told me that my C drive (SSD) had windows installed but wasn't added yet to the "starting list" or something similar. I pressed "Y" to add it, but the prompt told me that it "couldn't find system device" (I have it in German, this is a literal translation).
So now I'm sitting here, I have only my SSD plugged in with my Windows installation, but Bootmgr is missing even after I have tried many many things. What was weird about all this is that I managed to boot on my SSD and AFTER plugging in my HDD again it told me that Bootmgr was missing, even after I unplugged the HDD again. So now I simply can't boot either SSD nor HDD. Can anyone help?
Thank you guys!
