can you put os on msata in combo w/ hdd with raid cache on msata?

Funkid

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Mar 26, 2016
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Can you / Is it helpful to use 25gb of an mSATA SSD for OS and some programs, then use 1TB HDD as storage, and use the remaining 50gb of the mSATA SSD as cache to speed up the HDD?
If it is beneficail how do you set that up? My guess was 25gb volume of RAID0 (stripe) and remaining as RAID(Cashe).
My second guess was 25gb partition for OS, 10gb for RAID0 (Stripe), and remaining for Raid (Cache).
My Third guess was forget RAID use all 75gb for OS and programs, and HDD for storage(without RAID).