Uli Plank wrote:The speed difference between the T5 and the T7 is pretty much negligible, at least according to BM's speed test on my machine. They both perform just shy of 400 MB/s. But if you plan any double use of such an SSD for a camera, don't buy the T7, it won't work. BTW, sometimes I found the T7 even cheaper for the same capacity.
If you need more speed and you have a computer with Thunderbolt, I'd get an Acasis enclosure and a Samsung 980 Pro MVMe, that'll be really fast around 2.8 GB/s writing and 2.7 reading. But, of course, that's more pricey.
BTW, Rob, nice typo: "7200RPM eternal hard disk drives".
Where can I buy these?
Your hard disk drives aren't eternal? One of those rare occasions when spell-checker came up with an amusing substitution
The Blackmagic Disk Speed app gives me meaningfully better speeds on my T7 SSDs than on my T5s. See below. However, as you say only the T5 can be used as onboard storage when filming with a Blackmagic camera.
Uli and I had a fairly detailed exchange about Do-It-Yourself enclosures and the Samsung 980 Pro NVMe on the first page of a recent thread called
Help! Choosing a Computer.
There's also a current MacRumors thread that has a lot of information about using NVMe SSDs as external drives, and the discussion applies equally to Windows computers:
Thunderbolt 4 & NVMe M.2 External Storage: Read & Write Speeds. For the purpose of this discussion, there's no difference between Thunderbolt 3 and 4. There's also some discussion about Samsung's T5/T7 SSDs in that thread.
The Blackmagic Disk Speed result below is from a test that I just ran on a 2TB Samsung T7, using 5GB as the load on the drive. The read and write speeds are quite a bit higher than what I get with a 1TB T5. I don't have a 2TB T5, so I can't compare using the same storage size, but I doubt that it makes a significant difference. I did this test on a Mac. I can't vouch for the accuracy, but I've read that some Windows computers have somewhat faster read and write speeds for these drives.
Getting back to @Charles1969's original question -
What transfer speeds are needed to edit 4K RAW videos recorded with a Blackmagic 4K Pocket Cinema Camera? - this is plenty fast enough. The Samsung 2TB T7 currently sells in the US for $220, which according to Amazon price tracker
CamelCamelCamel is its lowest price ever. The 2TB T5 is only $10 cheaper.
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