LTolledo wrote: ↑
Thu Mar 19, 2020 11:41 pm
with the rootfs residing on the drives, there are no real world advantage between NVMe drive in USB3.0 adapters vs. regular SSDs in USB3.0 adapters,
That's correct, and there are significant disadvantages with heat and power consumption (as the OP discovered).
Using an NVMe drive on a Pi is kind of ridiculous. The enclosures are expensive and the Pi4 doesn't support USB 3.1 Gen2. In fact, the Pi4's USB 3.0 is only 4Gbps (not 5Gbps), and that's only when no other USB activity is happening, since all four USB-A ports share that 4Gbps bandwidth.
SATA-III is 6Gbps, which is faster than USB 3.0's 5Gbps, which is faster than the Pi4's 4Gbps, so a SATA-III SSD with a USB 3.0 adapter
or enclosure (or a USB 3.0 SSD) is all you need.
rpdom wrote: ↑
Tue Apr 07, 2020 7:24 am
Interestingly, I watched an interview with Eben yesterday. He was asked if it is likely that a future Pi would have a SATA interface. Eben said no and said that the USB adaptors work well for SATA so there is no point in building it in to a Pi. However he went on to add that if they did put any mass storage interface on a hypothetical future Pi, it would likely be NVME.
There are SBCs now with NVMe support, but they also only have a single PCIe lane, so that's mostly wasted. I've seen people harping on the Pi4's single PCIe lane not being exposed, but it's still a relatively slow 4Gbps interface, so adding a 4-lane PCIe NVMe drive to that would hardly affect performance over USB 3.0 (you might gain a little in latency).
If a future Pi model has multiple PCIe lanes, then it will be useful (otherwise NVMe is still wasted on that future Pi).
You could buy the Pi4 system in my linked picture
(minus the Fan-SHIM, but including the official PSU) for around the same price as just the NVMe enclosure in the OP (based on the current $105.99 price of the StarTech NVMe enclosure in the link).
Raspberry Pi 4B 2GB = $35.00
Crucial MX500 250GB SSD = $49.99
Eluteng adapter cable = $7.99
Acrylic 2 layer case with fan = $3.99 ($2.99 if you don't mind dark gray acrylic)
Official Raspberry Pi USB-C PSU = $8.99
Total = $105.96
Although to be fair, that is quite an expensive enclosure, but even cheap ones are much more than SATA ones.
My mind is like a browser. 27 tabs are open, 9 aren't responding,
lots of pop-ups...and where is that annoying music coming from?