3 ms·
>though this assumes failure rate is linear rather than accelerating over time, that failures are independent (vs a design flaw that causes them to fail around
by kgermino 10y ago
>though this assumes failure rate is linear rather than accelerating over time, that failures are independent (vs a design flaw that causes them to fail around the same time, which happens enough that people recommend buying drives from separate batches / date of mfg)
I saw this happen once. A drive died, it was replaced and while the array was rebuilding several more failed. They ended up losing the entire SAN.
It wasn't a good day.
- throwaway7767 10y agoThis is why I try not to buy many disks at once, just buy one at a time, and if I need more than one I'll go to different stores. Too much chance of getting a bad batch of disks and having the whole array go down (I've had that happen too). Of course, that doesn't work at a large scale, but then you have other methods of increasing redundancy.