Re: Storage tiers
> SSD will save you some power (but at 5W to 1W that's unlikely to be significant).
What about heat generation? For that matter, for say a peta-byte scale data center, does the heat generation difference between a 12TB versus 10TB HDDs matter that much (difference between 5 12TB versus 6 10TB for total 60TB say)
(Off-direct-topic - maybe) I read somewhere that some recent HDD (I think it was a WD 12TB) had 8 platters in an inch (25.4 mm) That's 3 mm for a platter *and* a head! How on Earth do they make that work (even with helium), and protect against external vibration? And how small is a physical head if the platter density is - what it up to now - 1GB/in^2? (1.5 MB/mm^2 if my maths are right)?
(Completely off topic) Would "maths" in BrEng be pluralized in the previous - where it is talking about only one "type" of mathematics - arithmetic? Or is the "singular math" seeping back across the pond by now?
Biting the hand that feeds IT
