I have a Dell Poweredge r720xd in RAID10. I’ve had a couple of drives fail since I’ve bought it and was able to buy cheap replacements on ebay.
I had another drive fail recently and one of the spare ebay drives came up as “blocked”. It put me out a few days while I waited for a new one to arrive; also from ebay.
I’d like to avoid getting another dud drive. Are there any reputable resellers of these old drives so I can stock up on some spares?
I think mixing RAM sticks is mostly fine today. Maybe you won’t get 100% performance but I don’t think it will be very noticeable. You may still run into issues with some capacity combinations depending on the mainboard/cpu. Regarding clock speeds usually all run on the clock of the slowest one.
Matching RAM latency also matters for performance.
When using different capacity RAM channels matter so take care on the order of population.