I'm waiting on my Synology DS423+ order and it's time to buy some drives, I'm just gonna start with one drive (Plex server, nothing critical that can be lost for now) and add more as time goes. I've read that the WD Red Plus is the quietest of the NAS-range drives from various manufacturers. It is very important that it is quiet and draws as little power as possible since the server is gonna be in a cabinet under the TV and energy costs are quiet high.
The retailer I'm looking at is selling drives up to 8TB with 5400 - 5640 rpm and 256 mb cache. 10 TB and up to 12 TB is 7200 rpm. On top of this from other retailers, specifically at 8TB I see one version marked as 128 mb cache and another as 256 mb cache.
I've tried googling but all I can find on Reddit is that all WD Red Plus series are 7200 rpm and then run slower, but why would they mark them differently?
FYI, I'm in Sweden so we don't have serverpartsdeals and the marking might be different here than it is in the US.
ChatGPT suggests that the quietest WD Red Plus are 1-6 TB and 8TB and up are noisier even though the retailer suggests the 8 TB one is 5640 rpm. Shouldn't 10 tb and up be the noisier one since they are marked as 7200 rpm?