"Backblaze Hard Drive Stats Q1 2019"
https://www.backblaze.com/blog/backb...stats-q1-2019/

"As of March 31, 2019, Backblaze had 106,238 spinning hard drives in our
cloud storage ecosystem spread across three data centers. Of that
number, there were 1,913 boot drives and 104,325 data drives. This
review looks at the Q1 2019 and lifetime hard drive failure rates of the
data drive models currently in operation in our data centers and
provides a handful of insights and observations along the way. In
addition, we have a few questions for you to ponder near the end of the
post. As always, we look forward to your comments."

Uh oh, those 12 TB Seagates are trending up. I suspect that they are
not helium drives.

I wish that they had more WDC drives but apparently they are driven by
economics and WDC drives are definitely more expensive than Seagate
drives. I do not think that HGST drives are old WDC drives but I could
be wrong.

Lynn