Why not both? Alerting to find issues quickly, a bit of extra storage so you have more options available in case of an outage, and maybe some redundancy for good measure.
A system this critical is on a SAN, if you’re properly alerting adding a bit more storage space is a 5 minute task.
It should also have a DR solution, yes.
A system this critical is on a hypervisor with tight storage “because deduplication” (I’m not making this up).
Yes, alert me when disk space is about to run out so I can ask for a massive raise and quit my job when they dont give it to me.
Then when TSHTF they pay me to come back.
A lot of companies have minimal alerting or no alerting at all. It’s kind of wild. I literally have better alerting in my home setup than many companies do lol
It’s certainly cheaper to not have any but it will limit growth substantially
There’s cases where disk fills up quicker than one can reasonably react, even if alerts are in place. And sometimes culprit is something you can’t just go and kill.
Had an issue like that a few years back. A stand alone device that was filling up quickly. The poorly designed device could only be flushed via USB sticks. I told them that they had to do it weekly. Guess what they didn’t do. Looking back I should have made it alarm and flash once a week on a timer.
