the approach i chose to use is to have 2 physically separate USB drives (independent enclosures). i have 2 USB ports on the NAS. each port will connect to a USB drive.
In the app, I setup 2 jobs that are identical except for the destination. Each job backs up all of my shares:
job 1: NAS shares → USB 1 (NTFS) brand X drive
job 2: NAS shares → USB 2 (HFS+ J) brand Y drive
Running both backup jobs will give me redundancy.
a single external enclosure would have been nice and RAID 1 would also have been an option, but don’t believe I would get better reliability for data protection with those vs. the option I chose.
these drives are all in the same physical location, so that is 1 point of failure … but practically I think it will be fine.
I would like to recognize NAS_User for pointing out the differences between CMR and SMR drives.
