This is a marketing pitch for a cloud storage company and it shows:
> - System hardware: $500,000
For one PB? Gold plated HDDs and cases I guess…
> Assume 15% annual system maintenance over five years
Do not run your hard drive cluster on the same floor as vibration-inducing machines, folks. /s
According to Backblaze, even a 8 year-old hard drive is still twice more reliable than this, and 15% failure rate is what to expect over 6 years of consecutive use!
> Assume the space needed to store 1PB is between 25%-50% of a standard rack (42U)
You can fit almost 10PB in a rack though, so that's another figure that they've inflated.
> Assume personnel costs to manage a 1PB system are 0.5 IT/storage admin FTE
This one is probably true (and it's even an underestimation) if you have only 1PB of data, but it's not going to scale linearly: you're never going to need 130 FTE for 260PB.
Overall, if a supplier (who's going to use the same kind of off-the-shelf tech as you would) claims that his price is 4 times cheaper that what it would cost you to run it by yourself, he's probably just lying to sell you stuff, just saying…