Fri Dec 11, 2015 11:25 pm
Actually, you can, if you get something like the C-box. Since both common SSDs and Cfast cards are SATA-6Gb/s devices, this device essentially is a physical/electrical adapter that powers the SSDs and lets it talk directly to the camera. It's not for everyone, but it certainly has a lot of potential applications. Honestly, its just some simple physical and electrical parts (<$100) so I'm hoping at some point someone will build something like it and sell it at a more reasonable price, but even at this cost it will save a ton of money and potentially allow for a more efficient workflow for certain types of productions. Although it may be a bit more unwieldly than internal cfast depending on how you mount it, due to the massive cost savings over Cfast you can simply record to two at once at double the framerate and 360deg shutter to get two streams of video essentially identical to one at 180deg at your lower framerate.
It's not entirely true that Cfast is faster than even low to mid end consumer SSDs since again, they use the same interface. Almost all the decent SSDs now pretty much saturate the SATA-6Gb/s interface, with good models like the Samsung 850 Pro hit around 550/520 MB/s max read/write, while even the fastest Cfast cards claim only around 510/450 max, and much lower minimum. However, higher end SSDs (and I'd bet Redmags, AJA Paks, etc.) use variants of the PCI express interface which allow for much higher transfer rates, up to 3200/2600 MB/s read/write. Furthermore, while for run and gun there are certainly advantages to the smaller and potentially tougher Cfast form factor, I've heard plenty of reports of various bad things happening to Cfast cards in the past, e.g. corruption, files disappearing, poor write speed, complete failure, etc. while I've not heard as much of the same about good, recent SSDs like the 850 Pro--plus, since you can buy six 256GB/s 850 Pros, the gold standard in SATA-6Gb/s SSDs as far as I'm concerned, for the price of one good, and still slower 256GB CFast card due to the tremendous and ever growing economy of scale that SSDs have, you can shoot more, backup more, and worry much less about deleting anything anyway.
CAM Gerlach (Christopher A. M. Gerlach)
I am not an expert; take any advice I give with a grain of salt.