Re: RAID & Backups

["Robert B. Carleton" <rbc@rbcarleton.net>]

On Wednesday, September 3, 2025 11:58:42 AM Central Daylight Time Robert B. 
Carleton wrote:
> On Wednesday, September 3, 2025 10:53:53 AM Central Daylight Time alain
> 
> williams wrote:
> > We were talking about RAID a few days ago and how they are different from
> > backups.
> > 
> > • RAID helps to protect you against hardware failure, the idea is that you
> > can have a disk fail and still continue running, then replace the broken
> > disk and rebuild to give you a protected system.
> 
> [...]
> 
> > Sorry if I sound like a preacher, hopefully this will someday save the
> > backside of someone who reads this.
> 
> I like to think of redundant RAID as buying you some time to repair a
> failure before it interrupts services. It's not really a backup at all. You
> can still have some kind of software/firmware failure lose the data with
> redundant RAID in place. There needs to be a copy somewhere else if the
> data is important.

I forgot to mention that the RAID cabinet also be physically destroyed by a 
power surge, fire, flooding, etc. I personally don't have a lot of data, but I 
actually take a jump drive with everything to store in a bank safe deposit box 
twice a month.