WD Gold Enterprise drives are specc'ed as this :
datasheetLoad/unload cycles 600,000
Non-recoverable read errors per bits read <1 in 10
15 MTBF (hours)
2,500,000 AFR (%) 0.35
Limited warranty (years) 5
Workload (in fineprint) 219 TB per year
WD Red Plus :
datasheetReliability/Data Integrity
Load/unload cycles4 600,000
Non-recoverable errors per bits read <1 in 10
14 MTBF (hours)5 1,000,000
Workload Rate (TB/year) 180
Limited warranty (years) 3
AFR not specified ..
So you can see 2.5 M vs 1M MTBF , 219 TB/year vs 180 TB/year etc etc ... In theory the enteprise drive is better.
In practice, you could buy 10 enterprise drives and 10 nas drives and have more enterprise drives fail on you within a year.
Backblaze publishes stats for their inventory of drives, and their AFR is a bit higher, at around 0.5-0.7, with Seagate being much worse, close to 1-2% :
https://www.backblaze.com/blog/backblaze-drive-stats-for-2021/But take their results with a big grain of salt, because they don't use the hard drives as a typical person would use them - they have 4U cases where they shove 40+ drives in a case, so they're probably running much warmer than normal, and there's significantly more vibrations compared to what a drive would experience in a normal case, or in a max 8 drive NAS system.
They had 202759 drives in 2021, and 1820 died ... 1.01 AFR average, but Seagate drives peaked at 4.8% AFR ( 77 out of 1611 14 TB drives died)
You'll find HGST drives ( now WD Gold and other higher end models) among the lowest failure drives.
