backup NAS recommendation -- Windows 2012 R2 ?

Which 32TB (RAID) backup solution
"NAS, Windows Storage Spaces, etc"
do you recommend for the below since
I do NOT want to use a CLOUD service ?
  ** assume a $2,000 LTO TAPE backup
     solution would be cheaper ?
===============================================
OPTIONS
  ** RAID-5 NAS from QNap/etc
  ** RAID-5 2nd Windows Server 2012 R2
     physical server running Storage Spaces/etc
  ** something else
===============================================
LAYOUT
 ** two locations
 ** one PHYSICAL 4TB server at each location
    with data that does NOT change very often
 ** 100 Mbps PRIVATE fiber line between sites
 ** 100% Windows 2012 R2 STANDARD HyperV
 ** BACKUPS
      ** DAILY
           --> incremental backups
           --> 14 day retention policy
           --> replicated to other location
      ** WEEKLY
           --> 4TB full backup
           --> 30 day retention policy,
                 ** 4 weeks @ 4TB
                      --> 16TB per site
           --> replicated to other location
                 ** 4 weeks @ 4TB
                      --> 16TB per site
      ** MONTHLY
           --> above 4TB WEEKLY full backup
           --> 1 year retention policy
           --> replicated to other location
                 ** done via TAPE to reduce
                    hard drive requirements
finance_teacherAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

David Johnson, CD, MVPOwnerCommented:
Don't use RAID-5 for anything over 8 TB use RAID6 or some other technology with 2 parity drives the actual cutoff is 12TB where the odds of a bit error corrupting is theoretically possible.

Many small drives give better performance and if a drive fails faster rebuild times but use more drive bays..  You did not give us the expected rate of change or the expected increase in a per day or per month basis.  Storage Spaces with JBOD' s are a lot cheaper than a dedicated NAS and RAID subsystem.

remember 3 copies x 2 different media x 1 offsite.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Storage Software

From novice to tech pro — start learning today.