The account teams, sales guys and support center have two totally different views on this. From a support perspective as long as its a NetApp drive we will support it and troubleshoot it. But from a sales and account team perspective you may have some sort of contractual obligation or verbiage that states otherwise.
Keep in mind those 2TB's will rightsize to 1TB to match the others. So you will lose some space buying those. Maybe older repurposed 1TB drives will work better for your specific scenario...
Either way, I would suggest you reach out to your account team and request they review to ensure you're compliant.
Regards,
Richard Santos Garcia
Field Support Engineer, cDOT NCDA, NCIE-SAN for E-Series
Pacific Northwest, (OR, WA, AK)
NetApp
386.216.9583 Mobile
888.463.8277 Support
rsantosg@netapp.com