Selfhosted
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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There are two types, CMR and SMR. You can read online about the differences. CMR is better because SMR tries to be all fancy in order to increase capacity, but at the cost of speed and data integrity.
It won't be front and center in the specs of a particular drive, but you usually find the info somewhere.
I wouldn't worry about higher capacity failing sooner. If you have 10x4TB vs 2x20TB, that's 5x as many drives to go bad. So a 20TB drive would need a 5x worse fail rate to be considered worse. A pro of larger (fewer) drives is lower power consumption. 5-10 watts per drive doesn't sound like much, but it adds up.
If you are buying used datacenter drives, larger capacity drives are also likely to be newer, which tips the scales a little more in that direction.