Reducing the number of drives you are running, reduces the risk of losing data. Do you disagree?
Depends entirely on the config. RAID 0? Higher risk. RAID 1? Lower risk.
I run RAID 0 on a couple of external USB drives with a full backup on Google and locally. No worries.
The amount of risk of drives failing is not dependent of your raid config at all. ignoring excessive duty cycling. I believe you are misunderstanding the point I was making in my original reply. I’m claiming that these 32TB drives will reduce your risk of losing data than by raiding 2 16TB drives, given the same failure rate.
I’m uncomfortable storing 16TB worth of data on one drive
Example you have 20TB of data. What is safer?
- 2 16TB drives in raid0
- 1 32TB drive
This is completely irrelevant to your backup solution. You should have backups, of course, but I don’t see how that factors into my point? You have to put the data somewhere, and then back it up, where do you put it? I will always put it on as few physical drives as possible, to minimize the risk of drive failure over time so I don’t have to restore/re-stripe as often.
I’m claiming that these 32TB drives will reduce your risk of losing data than by raiding 2 16TB drives, given the same failure rate.
Assuming the probability of failure is the same, you’re right, running two drives doubles the risk of a drive failing.
However, if your single 32 TB drive fails, all data is gone and you have to rely on backup. If one of the 16 TB drives fails, you replace it and the RAID restores the data with much less hassle.
Both 16 TB drives failing at once is negligible (however, the RAID controller might).
You misunderstand the intent then.
Why would anyone back up data in the manner you’re saying? That’s dumb.
Don’t split the data across multiple logical locations, keep it logically contained. A raid designed for availability is better than a single external hard drive but that isn’t what is being talked about.
3 2 1 means keeping multiple copies of the SAME data on multiple media types in multiple locations so you remove a single point of failure.
