Still not as fast as a native PCIe SSD.Thunderbolt external SSD = problem solved.
+1. This is what I am doing. I have a 500GB Samsung 840 Evo in a Delock Thunderbolt enclosure.Thunderbolt external SSD = problem solved.
Which will be of absolutely zero noticeable difference to the user in terms of system responsiveness and is a non-factor unless you're a professional video editor or something similar (in which case you'd probably wouldn't be using an iMac anyway).Still not as fast as a native PCIe SSD.
I have a 512GB Samsung 840 Pro in a Buffalo HD-PATU3 Thunderbolt case (swapped out the spinner in it), and I get around 350MB/s in writes and 450MB/s reads (on my cMBP, it gets 460MB/s writes and 510MB/s reads).
Meanwhile a native PCIe SSD in an iMac will perform at 700MB/s in both reads and writes.
Not a question that it's easy to answer as it's so dependent on your usage profile. There's a 4Gb 'write buffer' (my term), which means that new files that are created or copied are written to SSD initially. Then, if it needs more space than 124Gb, there's some form of tidying process that ages out old blocks that are not being read or written as frequently as other blocks. But, it's all dependent on disk activity - in other words, how much you're doing.Do you guys have any idea about how much data does a Fusion Drive writes daily to its SSD?
Pricy yes, but not as expensive as Apple's internal SSD options in equivalent sizes.Isn't a thunderbolt external SSD extremely expensive?
I wonder how much decrease in performance would be without TRIM support by using USB enclosure overtime. Most SSDs now days should support Garbage Collection on hardware level, though I'm not sure how effective against TRIM. It'd be interesting to know if anyone has experienced noticeable drop in performance over time.
It's coming down now, as more manufactures come to the market. When I bought my R4, Promise were effectively the only company producing consumer T'Bolt units, so I paid a lot ( £839.00) equally, they seem to be the only outfit who have kept their prices high...If I was buying now, I'd look at other options...A lot of new products at slightly more sensible prices are now available.Isn't a thunderbolt external SSD extremely expensive?
Do you guys have any idea about how much data does a Fusion Drive writes daily to its SSD?