T wrote:
On 1/7/19 7:11 AM, Ken Blake wrote:

If you saw a device for which a 1.5 million hour MTBF was claimed,
would you believe it? If my arithmetic is right, 1.5 million hours is
over 160 years. How did they test it and determine that number?


That means if you place 1.5 million unit on a test bench,
one unit is predicted to fail in one hour. It is a pretty
useless figure

Have you seen the size of the test chamber they use ? :-)

https://www.tomshardware.com/reviews...es,4408-3.html

Actually, the picture I was looking for, is missing. There's some
chamber they use for infant mortality, that runs the drive
for a short period of time. It had a big circular door on
the end, for once the chamber is loaded.

The WDC one seems to use a similar 6000 slot robot as Seagate.
I think the idea is, the robot can continue loading and unloading
slots, while the chamber stays at temperature.

https://www.tomshardware.com/picture...-tour.html#s38

https://img.purch.com/rc/600x450/aHR...FsaWJ1ci5qcGc=

I don't think any of that though, is life cycle testing.

They have at least 30,000 slots to hold product in
that one facility, so it'll take 50 hours before one fails :-)

Paul