John,

Each OS is on its own 2TB 7200 HDD (WD Black) - actually all the drives are 2TB WD blacks, when I built (2011) it was too expensive to put in 10k RPM drives and 2TB's 10K were rare as hens teeth.
So 12TB's internal storage (and a scores of USB 2 and USB 3 drives for additional -redundant storage, backups, and off site backups - I make redundant back-ups and move one off site every week)

USE EasyBCD its FREE for BOOT options and control and management

http://neosmart.net/EasyBCD/

Not sure I would do or try dual boot in a laptop, the redundant overhead required for OS's is wasteful (just my opinon) - at least until you can get dual, or more, internal SDD's and they would need to be LARGE (2TB's or more) again IMHO

Check PM I think we've worn out our welcome in this thread

Larry


Win10Pro,i9,64GB,2TBSSD+20TBHDDs,1080TI,BIAB'24,Scarlett18i8,Montage7,Fusion 8HD,QS8,Integra7,XV5080,QSR,SC-8850,SPLAT,FL21&others,Komp.14,IK suite&others, just a guitar player-AXE FX III &FM9T, FishmanTP, MIDIGuitar2, GK2/3'sw/GI20