Which iSCSI enabled NAS would be better to backup of hyper-V VM or would you like to suggest some other backup solution?

On a single server I have four VM. All the VM are on RAID 1 with 6Gbps SAS drives with hardware RAID controller equipped with cache memory. Server capacity is 3 *900GB + 300GB
I am using native windows backup software & using portable USB 4TB HDD attached with USB 3.0. Backup is scheduled for night daily.
During the night no user is connected to the server.

As backup is taking too much of time now; I am considering to switch to NAS. Currently total daily backup size is 2TB (Full backup)

I am considering to use a NAS with RAID 0 to double up HDD R/W access speed. Would use two 1Gbps ethernet (Link aggregation)
I would map NAS using NAS iSCSI target feature with windows Hyper-V Windows 2016 iSCSI initiator feature & would schedule windows backup hoping it would reduce the backup time much.

First query: If the idea to use NAS is good enough considering the backup solution in a budget.
Second query: Which NAS should I choose:



NAS 1:  Western Digital or Netgear?
http://naschart.com/compare/western-digital-my-cloud-pro-series-pr4100-pr4100-72,netgear-readynas-104-rn104-79 
https://www.wdc.com/products/network-attached-storage.html 
  I belive I must use enterprise grade HDD: https://www.span.com/compare/WD4002FYYZ-vs-WD40EFRX/57219-41629
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Akash BansalIT ProfessionalAsked:
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
I have two very thorough EE articles on all things Hyper-V:

Some Hyper-V Hardware and Software Best Practices
Practical Hyper-V Performance Expectations

I also have a couple of blog posts specific to your question:

Protecting a Backup Repository from Malware and Ransomware

Disaster Preparedness: KVM/IP + USB Flash = Recovery. Here’s a Guide

All of the answers you need are there.

EDIT: I suggest StorageCraft ShadowProtect with the Continuous Incremental Backups set up to a High-Rely or equivalent. I'd never send backups to a NAS set up with RAID 0. That's just asking for trouble.
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Akash BansalIT ProfessionalAuthor Commented:
Thanks for sharing so wonderful articles.
I have already started fine tuning my existing installations based on the articles you have shared.
Later I would seek more info on a few points.

Still I can't decide which backup software & which backup hardware to use.
Most of the backup software either are too expensive or have least presence in our area. Looking for subscription based backup software & economical hardware.
https://www.veeam.com/vm-backup-recovery-replication-software.html
https://www.commvault.com/resources/commvault-hyperscale-appliance-technical-specifications
https://www.acronis.com/en-in/business/backup/

Should I backup from HyperV host or from inside the guest OS.
One VM is having exchange 2013
Second VM DC 2012 R2
Third VM is having an ERP based on Windows Server.
Fourth VM is MS SQL server

Currently windows server backup is transferring 2TB including all the VM & incremental of HOST Disk.
How much time/Data should I expect if I move to proposed backup solution?

Thanks for the guidance.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Our rule of thumb is StorageCraft ShadowProtect for smaller deployments as it gets set up in-guest.

For higher density setups and higher density clusters we use Veeam. I suggest using them before all others.
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Akash BansalIT ProfessionalAuthor Commented:
Thanks again :)

I have requested quote from shadow protect!

Which hardware would you recommend for the backup destination.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
The prices are in their store: https://buy.storagecraft.com/

As far as where to back up to, will there be a need for off-site?

I suspect the answer is "Yes".

Option 1: Local NAS with ImageManager syncing backups to cloud storage
Option 2: Locally attached USB drive with folder share for VMs to back up to (\\Hyper-V\BU_Here)

The backup repository blog post has instructions on setting up Option 2. We would have at least three drives to rotate off-site at least once every 2 weeks.
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Akash BansalIT ProfessionalAuthor Commented:
Only sql data is required to be backup at offsite. That is a few GB. It would be great if it could be pushed to azure.

Rest i believe backup to NAS would be more suitable.
Should we backup to a folder shared at NAS or iSCSI target at NAS?
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Sync the .BAK files up to Azure or use Azure Site Recovery for the VMs.
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Akash BansalIT ProfessionalAuthor Commented:
.bak file from the sql machine?

Dont want to backup full vm ... dont have enough Internet bandwidth.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Correct. Schedule a SQL .BAK run and sync that up.
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Akash BansalIT ProfessionalAuthor Commented:
Thanks for the deep explanation of each thing & guiding the best practices & optimisation of my existing installations.
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Akash BansalIT ProfessionalAuthor Commented:
A comparison between Shadow protect VS Altro VM backup

https://www.optrics.com/downloads/Altaro/AVB-vs-StorageCraft-ShadowProtect.pdf
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Akash BansalIT ProfessionalAuthor Commented:
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Akash BansalIT ProfessionalAuthor Commented:
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
We don't change what works. :)

Veeam and ShadowProtect.
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Akash BansalIT ProfessionalAuthor Commented:
Thats right! Its a rule of thumb!

As i have a tight budget and Altro fits the budget... Can we consider it over shadow protect?

Comparison is also given in previous comment.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
I think ShadowProtect and Veeam are worth it. Both offer subscription models for a low monthly payment.
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Akash BansalIT ProfessionalAuthor Commented:
Veeam and shadow protect are very costly
1 US dollar is about 70 INR and we are a very small business.
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Akash BansalIT ProfessionalAuthor Commented:
I have a single populated socket basic server running 4VM.
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