Glad you had a backup on the SCSI drive
10 years ago I had a backup machine and relied on a mirror raid setup with 20 drives to hold all my data, so held everything from all my source code from first demo ever to latest projects, images, video and well pretty much everything I ever had gathered was there.
Then the PSU went haywire and fried every single drive
That was a devastating blow and I couldn't belive it, so much lost even if i had some on other drives and optic media it was a tough setback.
Lesson learned from that was to have more backups
Today I have two backup machines, one for important personal projects/data and one holding everything from my retrogame collections (including backups of original media) to personal files.
I also backup every machine not just my Linux/windows machines but my alternate OS machines, retro computers etc
To keep somewhat safe if the house burns to the ground I have one machine inside the house (the small one) and the other inside my garage/workshop (really need to have it there anyways since rack mounted servers are so damn loud, also always colder there then inside so healthy for the server and hey Sweden has a lot of winder haha).
One system running mirror raid the big system running ZFS.
Also one of the servers works extra as my webserver/FTP.
Storing backups online is not possible really since im over 50TB heavy in data that I deem important nowdays and I don't like my files to be anywhere but in my own hands
I also have some really important files on hard drives that are not plugged in to anything.
One thing to think about when having backup servers is to write software/scripts that index drives in the network you want to have backed up to set date/time to backup new files/edited files to the backup server to save a lot of work (dont forget to keep logs).
Might be software out there that does this, haven't looked into it since my own solution works well enough.
Also if you have risk for power surges from thunderstorms you have to take that into account also, where I live our lines are underground so not airborn and closest point where a thunderstorm can hit is not really in range for me to be worried, but worth to take precations for if you are in the risk zone.
As allways when I get started I write way to much, sight...
Edit: My 1337th post