HD life span survey

[JJT211]

I was just looking over my smart status report and am just curious about the forum consensus of real world HD life span. If anyone can think of any other questions to include, please feel free to chime in and ill include in survey.

For reference: 1 year = 8760 hrs

RAID array =
Disc type =
Oldest disc =
Newest disc =
Average age of discs in pool =
Discs replaced since start of current pool =

 

[JJT211]

Here's mine:

RAID array = RAIDZ2
Disc type = WD Red 4TB
Oldest disc = 23730 hrs
Newest disc = 7795 hrs
Average age of discs in pool = 19182 hrs
Discs replaced since start of current pool = 1

 

[MrToddsFriends]

RAID array = 2 x 2-way Mirror
Disc type = 4 x WD Red 3TB (WD30EFRX-68EUZN0)
Oldest disc = 23163 hrs (Power_On_Hours)
Newest disc = 1066 hrs (Power_On_Hours)
Average age of discs in pool = 14650 hrs (Power_On_Hours, arithmetic mean)
Discs replaced s.s.o.c.p. due to disk failures = 0
Discs replaced s.s.o.c.p. due to other reasons = 2