>>1327140that's the exact opposite of how RAID typically works, if one drive fails the rest still operate fine. In some RAID levels, you can even have two or more drives fail and still have it keep going.
only RAID0 has this problem, and you wanna know why it's called RAID ZERO? Because that's how much data you'll have left if you use RAID0.
as for backup, you back it up the same way you back up any other data. By having at least one additional copy, preferrably two.
Ideally you follow 3-2-1
>3 sets of your data>2 different types of storage>1 being off-sitefor different sets you can have a second RAID array, an external HDD, or even CoW snapshots which take up no extra space
for different types of storagr it could be HDD, SSD, LTO Tape, cloud, etc
for off-site you could simply take your backup drives to a relatoves house, or use cloud backups.
it's worth noting that not all data needs this treatment. My media (40+TB) isn't backed up at all because frankly, it all came from torrents I can just download again.
My music collection (1.5TB) (mostly ripped or otherwise sorted by me by hand) is backed up with snapshots and a second copy at my dads house
my important documents and family stuff (>1TB) also has an offline copy on a NAS that boots up once a week to backup, and encrypted (by me before upload) copies are stored in S3 buckets
Bear in mind, RAID is not a backup nor is it really related to backups at all - it just stops you from needing to buy a new HDD and copy your data back onto it right away (you will still need to do this at some point). The benefit mostly is for businesses who have clients that need constant access to that data and can't afford to wait for recovery
Think of RAID like airbags in a car, and backups like insurance.
The airbags stop you from being instatly killed, but the insurance pays for your medical treatment so you don't die from internal bleeding.
remember this:
RAID protects you from DOWNTIME
BACKUPS protect you from LOSING DATA
