Run 260TB 24*7. Over the last year, virtually all WD disks have failed. The support was a disaster! An exchange over seven corners that was even refused at the end, despite the warranty. WD drives, especially the 3TB and 6TB are simply rubbish. I recommend Seagate with Archive and IronWolf.
Pro for WD RED
Quieter operation 29db instead of 32db
Lower power consumption 6.4W (operating), 5.2W (idle) to 9.0W (operating), 7.2W (idle)
Longer warranty (5 years instead of 3 years)
Pro for Seagate
more cache 256mb to 128mb
fast rotation (7.2k to 5.4k )
HDD is not helium filled
better integration with Synology DSM (V6.1 and higher)
cheaper
I switched to the Seagate because of the lower price. My NAS is not in a location where I would hear it and the discs switch off after a certain time. So the slightly higher power consumption and the noise are only of marginal interest to me. Furthermore, I have a good backup strategy (location-independent mirroring) and therefore the shorter warranty period is acceptable to me.
I hope I have helped you with my information.
I had two WD Reds which failed. That's why I decided on the Seagate. However, I have to admit that the storage of my NAS was suboptimal, which led to the failure. I have now corrected this.
Since I also increased the capacity when I switched, the speed cannot be compared (larger discs tend to be faster because of the higher data density, but you have to look at that in each individual case).
According to the data sheet, the Seagate should be faster (spins faster) and also consume more power. I can't check the power consumption, the speed is indeed faster, but as mentioned earlier, I would have to compare with discs of the same capacity, which I don't have available.
The Seagate is also much louder. Of course, this is only the case as long as data is being read and written, but that's what the disc is for.
What counts for me is reliability and longevity. Nothing is more annoying than a HD that fails and can no longer be read. However, these discs have not been in use long enough for me to make a statement on this point, so I can't say anything yet.
