I currently have a desktop with three hard drives, a 120GB SSD, a 1TB HDD and a 2TB HDD. On my SSD I'm running Lubuntu, the 1TB HDD has Windows 10, and the 2TB HDD has Ubuntu MATE.
When I power on and press F12 I see PC-Linux-OS, Ubuntu, and my drives.
For context, I started out with my SSD with Lubuntu on it. Later on I installed Windows 10 to my 1TB HDD. After installing Windows I noticed it did not add a boot entry, however after updating grub on Lubuntu, Windows Boot Manager was located within the Ubuntu boot entry. Then I tried to install PC-Linux-OS to my 2 TB HDD, for some reason I could not get it to work, but it added a boot entry for it (which couldn't boot). So after some deliberation I downloaded and installed Ubuntu MATE onto my 2TB HDD, but the PC-Linux-OS boot entry is still there.
I'm trying to remove the PCLinuxOS boot entry, and separate the Windows Boot Manager from grub so that it has its own separate boot entry (default). Windows and the two Linux OSs are all on separate hard drives and I want to make my boot menu reflect that.
Also I've been trying to figure out how to move Windows 10 to my SSD (which has Lubuntu on it), and Lubuntu to the 1 TB HDD (which has Windows on it). I saw a few questions and guides that used Clonezilla and Tuxboot, but I'm not really confident with trying this yet. I feel as though if I clone my Windows HDD to the SSD with Lubuntu in it, I wont be able to boot Windows due to the fact that the Windows Boot Manager is inside grub.
mobo: Gigabyte z87-ud3h
CPU: Intel i5 4690k
SSD: Samsung 128GB (sda1/2/3 with Lubuntu)
HDD: Seagate 1TB (sdb1 with Windows 10)
HDD: Seagate 2TB (sdc1/2/3 with Ubuntu MATE)
Boot Info Summary: http://pastebin.ubuntu.com/16338254/
recommended repair summary http://paste.ubuntu.com/16354671/