Hi, I'm currently using Intel RST RAID 0 with 2 hard drives. I have some questions and issues that I'm unable to find elsewhere hence I'm posting this here. Hopefully someone will be able to answer them.

In Intel RST app, I get the option to choose different types of cache:
1. Write Back
2. Write Through
3. Read Only
4. Off

So here are my questions:
1. Where is this cache stored and what handles caching?
2. Is the any way to enable write only cache? (in the help page it say Write Back and Write Through includes read cache).
3. When I disable write cache buffer flushing, does it disable buffer flushing on the RAID cache or the drives' cache?
4. Why does using the RAID array (writing at ~250 MB/s) cause one CPU Core to max out its usage (by a process "System")?
5. Why does enabling any sort of cache on the RAID array cause in game stutters, or ~100 ms freezes on the entire system when the game tries to load textures? The issue is mostly gone if I set the cache mode to "Off" and is entirely gone if I transfer the game files to my SSD.
6. Why does both the RAID array and SSD perform below specs when I'm using them simultaneously or when copying files from one to the other?
SSD: 165 MB/s
RAID: 200 MB/s
Both ~1000 ms average response time

Usually:
SSD: 530 MB/s
RAID: 300 MB/s
Under 10 ms response time

Specs:
Intel i7-9700 (8c/8t @ 4.7 Ghz)
Asus H370-F
Samsung 860 Evo SATA SSD (Pass through/non-raid)
RAID 0: 2x Western Digital Blue 7200 RPM 1 TB (CMR)
64KB Strip size
Intel RST 17.5.0.1017 (Windows)
Intel RST 17.2.0.3790 (BIOS)
Windows 10 Pro 21H1