Hello i have hp compaq 8200 elite sff i7 2600k 24 gb ram and the computer has few ssds installed inside. Most of the ssds are 250gb inside it but i have windows 10 installed on a samsung 870 evo 500gb, i was thinking is it possible to split this ssd to 3 drives and install separately every windows on it? I might even split it to 4 to get vista on it... if possible? I feel like.im wasting ssds for nothing because i physically plug new ssd every time i want to change os and i dont think its ideal.. also i wanted to know if i can make all of the oss to run on IDE mode (win 10 works on ahci on this pc and i dont know if there are any differences but i just want everything to work) also my windows 7 has oem key that i bought online i wanted to know if it will be gone if i make new install or it will remeber my pc? And i was also thinking to clone this win 7 ssd to save the key. Im a little confused and all over the place i would like some assistance. Thanks