Well . . . . like the criminal character Ray Lucca once said to Richard Farina the FBI man in "Crime Story:"
"I'm back! I'm bad! I'm on top! You wing-tip Bozos don't have nothin' on me!"
As per my thread in "
General Hardware" about my "
Gurr-eat Z170 system," you would be surprised how these Windows Feature Updates or Creators Updates can bork a dual boot system, and the symptoms may vary.
You are advised to run a Rescue Disk or Repair Disk from bootable CD or bootable USB to repair the MBR of the boot disk, and you are advised to do it as a routine matter even if your feature update seems to be flawlessly installed. That is, I recommend this routine attention for anyone with a dual-boot system. Only for knowing what works without flaw when these things happen, I recommend Macrium Reflect Free or any licensed Macrium version -- current one being v. 7.
Windows feature updates will mess with the boot record and cause problems such as I described in that thread.
But my caching configuration is back, my full complement of RAM is reinstalled and tested. There was never a "hardware" problem. Of course, someone could try and blame the caching program, but that's the wrong assumption or conclusion.
I can see how getting a device like the Intel 900P would mean less use of RAM in the caching.
I never had "mainstreamer" intentions for my Samsung 960 Pro and EVO. Once I'd installed the EVO as a caching volume, though, my fate was sealed: I'll have no worries of using slower media on this system as long as they can be cached to NVME and RAM. I only wish that Intel had beat Samsung to the market and released 3D XPoint NVMEs in fall 2016.
Personally, I just think it's all too much for mainstreamer computer users, beyond merely wanting an NVME as a boot-system drive without anything more fancy than that..
Prices should eventually come down for these NVME devices, and ultimately as 3D XPoint technology matures.