[ohelabs]

“ For redundancy, I am backing up my computers to 2 separate network storage devices.”

Hopefully he understands that this is not a true backup....he’s basically created a more complex RAID 1 running two NAS...

For example a flood, a House fire, theft, or a power surge is probably going to lose/fry both then everything is gone. This is a perfect example of thinking you have something backed up but if you store it in the same place you just created a more complex RAID 1...

If you want a backup you need to store a copy in a different location preferably a different region because if you put it at your friends house down the road they are also likely to be hit by the same disaster (i.e flood, tornado, hurricane, war, etc.) as you are.

[eeh]

TFA explains why he didn't use RAID1: "I put in one hard disk per device for maximum redundancy: any hardware component can fail and I can just use the other device.". If the motherboard dies on one device, he still has a working device.

A backup to one computer is better than none.

A backup to two computers is better than one.

A backup to four computers in two geographic regions is better than two local.

There's no end to how good a person's backup can be. Everyone has their limit.

[secure]

Yes, I understand. I have an off-site backup for that reason, in a different part of the city: https://michael.stapelberg.ch/posts/2018-01-13-offsite-backu...

The redundancy is just for home, because I don’t want to wait for replacement hardware for my setup to work.

[ohelabs]

That’s definitely an improvement and a cheap solution. I always have to remind people of offsite backups... I had to learn the hard way and I’ve now migrated to Backblaze for one of my backup copies for my cold data .