Backblaze fail stats for their hard drives,
The assumption that “enterprise” drives would work better than
“consumer” drives has not been true in our tests. I analyzed both of
these types of drives in our system and found that their failure rates in our environment were very similar — with the “consumer” drives actually being slightly more reliable.
The only reason to buy an enterprise drive is the 5yr warranty...
Today on Amazon, a Seagate 3 TB “enterprise” drive costs $235 versus a Seagate 3 TB “desktop” drive costs $102.
Most of the drives we get have a 3-year warranty, making failures a
non-issue from a cost perspective for that period. However, even if
there were no warranty, a 15% annual failure rate on the consumer
“desktop” drive and a 0% failure rate on the “enterprise” drive, the
breakeven would be 10 years, which is longer than we expect to even run
the drives for.