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?
I belive I must use enterprise grade HDD: https://www.span.com/compare/WD4002FYYZ-vs-WD40EFRX/57219-41629