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I don't know anything about specialist video hardware, but isn't the real problem that your initial write from the camera is to storage with no redundancy?
Surely someone has packaged 2 drives and hardware mirroring into one rugged box?
SSD vs HDD is a different question. I think https://hblok.net/blog/storage/ is the nearest there is to a proper price comparison, in USD/MB, log scale:
chez_jay-
LaCie do one which I've heard is decent but I still have a (probably irrational) fear of their drives failing. We were forced to use LaCie drives when I was an employee years ago at another company and easily 5 out of 20 drives completely died within first 6 months.
Appreciate mirroring mitigates risk in some ways etc. Rugged raids are pretty new as these things go so I'm not wildly concerned about making two transfers initially (leaving 3 copies once complete which is pretty much the industry standard way of doing it to my knowledge on shoots of our moderate to small scale). Also I'd be more inclined to to have distinct copies at different locations than a single rugged RAID.
Thanks for the chart - interesting and I wonder what the various climbs are (around 2010 / 2014 / 2017)? SSD, from that at least, looks very much to be slowing down in terms of rate of descent so I'd imagine as good a time as any to start picking them some up to test workflows. Cheers!
CYOA
Just seen those R-series ones on Amazon for 250ish including VAT seemingly which almost sells it to me. What I like in particular is the fact they're not supposed to overheat so maintain speeds even after long transfers. Generally we'll spend a scary hour at the end of shoot days (or split it into a few sessions depending on time) to offload cards. The spinning ev drives get noticeably hot and transfers do slow down:
https://www.amazon.co.uk/G-Technology-G-DRIVE-mobile-SSD-black/dp/B078L9F34G/ref=sr_1_2?s=computers&ie=UTF8&qid=1521138630&sr=1-2&keywords=MOBILE+SSD+R-SERIES+1TB
Think they'd be legit?