Sounds like your raid array has screwed the pooch. You can try booting from USB install disk and repairing the MBR but that's no guarantee. Never use a raid array as the boot device. I learned that lesson long ago. When things go south the array will get corrupted. Better off using a single M.2 as a boot device. It will actually run faster. The latency of raid kills the random 4k low que depth speed which is has an effect on the OS as its largely comprised of 4k dll files. You can get a 1TB Samsung 970evo plus that's actually faster than the 980 pro for about $120. Or if you want one that screams at those speeds then an Intel 380GB 905P M.2 but they aren't cheap. Shop around and you can find one for under $500. The difference is the optane will get you 250MB/s 4K random where the two NVME drives in raid0 will yield about 40MB/s. Everyone gets hung up on the sequential write which is fine for scratch drives or media storage for vids etc but 4K random speeds is where the performance comes from. Raid even on a high end drive presents latency which kills that performance. If you can afford it Optane drives are where its at.
Heres some examples of two drives that by themselves will do 240MB/s in raid 0. The sequential number looks good amazing but the 4K is screwed (still stomps any other M.2), followed by a P4800X optane all by itself.
Lastly just a single 970 evo plus followed by 3X Samsung 860EVOs in raid 0
Bottom line for OS and apps 4k random is where its at. High sequential is good for media storage where its all large files. Bottom line dont pay attention to the sequential reads, look for the better performing random 4k drives for OS and apps. The bottom number is what matters for performance.
Heres some examples of two drives that by themselves will do 240MB/s in raid 0. The sequential number looks good amazing but the 4K is screwed (still stomps any other M.2), followed by a P4800X optane all by itself.
Lastly just a single 970 evo plus followed by 3X Samsung 860EVOs in raid 0
Bottom line for OS and apps 4k random is where its at. High sequential is good for media storage where its all large files. Bottom line dont pay attention to the sequential reads, look for the better performing random 4k drives for OS and apps. The bottom number is what matters for performance.
And if thats not enough to blow your noggin heres 4x Optane drives before microcode patches hit the performance on an ASUS hyperX16 card.
