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Re: 4Tb drives, I do the dollars-per-mb calculation before buying hard drives. The most recent time I included the enclosure cost and found that it was actually cheaper to go huge. Granted the enclosure was a Synology, but buying 16TB drives is the closest I’ve been so ‘solving’ storage in a long time. Formatting them and adding them to the array was brutal, and they are noisy, but it has been worth it.





Yeah, I'm using 4TB laptop-sized (2.5") external USB drives, because they are small, cheap, quiet, and they don't need a secondary power supply. At the time of purchase, they were the sweet spot, with 5TB drives considerably more expensive. That may have changed now.

If you're going for 3.5" drives, then yes I can well believe that the sweet spot is with slightly larger drives, especially if you take enclosures into account. I did the calculations for work a while back for shoving hard drives into something from https://www.45drives.com/ and it seemed that getting the largest drives possible was the best price/capacity option.


Buying enough 16tb drives for an efficient raid array is an expensive way to save money.

Something that's easy to overlook with larger drives is that their rebuild times are worse.

"Shucking" drives throws the economics way off even if it means having to do some hacks and losing warranty... Usually the drives that come in enclosures are smaller.


> Buying enough 16tb drives for an efficient raid array is an expensive way to save money.

A lot of ways to be efficient with money start by having or using a lot of it:)




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