Raid 5

I doubt you'll get a raid array to span sata and sas. so this is a sas drive?

even if you did install it in the raid 5 array then you'd only use 146GB of the 1TB drive, until all drives were 1TB in size.

do you think it is right to sell your services to your customers and then ask for free help? shall I send my invoice to your address?

If space is available add a second raid controller and add disk.