SamuelColt

Any advantage in using the 7200 RPM 128MB cache drive as parity?

I am in the process of building my first unRAID server. Here is the list of hard drives i have available. I am planning to use the two SSD drives as the cache but i am confused on what to use as the parity. What do you guys recommend? 1) Seagate 3TB Desktop HDD SATA 6Gb/s 64MB Cache 3.5-Inch Internal Bare Drive (ST3000DM001) 2) Seagate 3TB Desktop HDD SATA 6Gb/s 64MB Cache 3.5-Inch Internal Bare Drive (ST3000DM001) 3) WD Red 3TB NAS Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD30EFRX 4) WD Red 6TB NAS Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD60EFRX 5) WD Red Pro 6TB 3.5-Inch SATA III 7200rpm 128MB Cache NAS Internal Hard Drive (WD6002FFWX) 6) Samsung 850 EVO 500GB 2.5-Inch SATA III Internal SSD 7) Samsung 850 EVO 500GB 2.5-Inch SATA III Internal SSD