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New 10 GbE USB adapters are cooler, smaller, cheaper

jeffgeerling.com

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Re: New 10 GbE USB adapters are cooler, smaller, cheaper

#133

Earlier quoted context omitted.

Is there an SSD that saturates USB3.2 Gen2 speeds and requires USB4?

Oh yes. Samsung 9100 Pro does 14800/13400 MiB/s over PCIe 5x4.

What you're seeing are the speeds of various multi-tier caches (RAM, intermediate SLC etc.) It cannot write to its main flash memory that fast. While it to the user looks like they just wrote 10 GiB in a single second, the SSD is internally still busy for another 10 seconds persisting that data. The actual real write speed of top-shelf consumer grade SSDs these days is somewhere in the vicinity of 1.5 GiB/s. Most models top out at half of that or less.

Re: New 10 GbE USB adapters are cooler, smaller, cheaper

#134

10 GbE sits in a really weird spot for me, maybe I'm just not understanding something though. It's at most 1.25 GB/sec of bandwidth, yet it's relatively quite expensive. It's not sufficient bandwidth for getting good performance out of most SSDs, yet it's really excessive for any hard drives (except for RAID10 setups I guess). For SSDs you want thunderbolt (or 40+ GbE) connection for best latency and performance, and…

10 Gb is cheap! Mikrotik has a 4x10Gb + 1x1Gb port switch for $150 USD and an 8x10Gb version for about $275. I have the 8 port version.

SFP+'s and fiber are cheap, like maybe 50 bucks for the SFP+ set and fiber. 10Gb PCIe cards are maybe ~$50 new on Amazon with Intel chips and cheaper on eBay - I bought used 10 Gb Mellanox cards for $25 each - "they just work" under FreeBSD and Linux.

Copper 10 Gb used to consume waaaaay more power (like 5+W per port!) and cost more both in terms of the SFP and cable. In reality fiber is more environmentally friendly as there is no copper, less energy used, and less plastic per meter. So my setup mostly consists of SR and BR optics and DAC's. The "DAC" direct attach cables are handy for switch-switch or short switchNIC runs. And I will continue to run fiber for the foreseeable future and actively avoid copper.

Re: New 10 GbE USB adapters are cooler, smaller, cheaper

#135

Earlier quoted context omitted.

10gbe is a sweet spot at least for my homelab stuff. It's easy to find old enterprise gear for, cheap, and fast enough for everything I want to do.

Exactly. Enough supports 10gbe that you might as well grab it; a few Mikrotik switches, some old enterprise gear, and an adapter gets you some good speeds. Sure some of it might have been fine at 2.5 or 5 but those are relatively new and less commonly available.

I'm actually surprised at the amount of 2.5/5 gear I've been coming across lately, especially in the 2.5 space as more ISPs are pushing for gigabit+ to the house.

Verizon's been issuing a wireless router with 10G WAN and several 2.5G ports and MoCA support that includes a 2.5G adapter and they use that across all their current connection types. I was delighted to see that when I got the router a couple years ago.

Re: New 10 GbE USB adapters are cooler, smaller, cheaper

#136
post #9

Is it also possible to power a laptop through those adapters? PoE++ can deliver up to 100W of power, more than enough for most laptops.

PoE Texas sells the most compatible adapters for this use.

https://shop.poetexas.com/products/gbt-usbc-pd-usbc?variant=...

65W 802.3bt and gigabit Ethernet out on the same PD cable.

Also a crude fixed hub for data and a keyboard and mouse for docking laptops:

https://shop.poetexas.com/products/bt-usbc-a-pd?variant=3938...

Re: New 10 GbE USB adapters are cooler, smaller, cheaper

#137
post #63
post #53

All these USB version names. I used to know what they all meant, but then the USB IF went ahead and renamed them all and made a bunch of versions have the same name and renamed some versions to have the same name as the old name of other versions. I have absolutely no idea what anyone means when they say USB 3.2 gen 2x2. I used to know what USB 3.2 meant but it's certainly not that.

Oh, it's fine. The lack of clarity is in keeping with the USB C connector itself, which may supply or accept power at various rates or not at all, may be fast or slow, may provide or accept video or not, and may even provide an interpretation of PCI Express but probably doesn't. It probably looks the same no matter what, and the cable selected to use probably also won't be very forthcoming with its capabilities eithe…

The USB A connector stayed the same between USB 1, 2 and 3. Yet most manufacturers voluntary distinguished them by giving USB 1 and 1.1 a white insert in plug and port, USB 2 a black insert and USB 3 a blue one

This was neither standarized nor enforced, yet it worked remarkably well in the real world

Then we decided to just have no markings at all on USB C cables. On the ports at least we occasionally get little thunderbolt or power symbols

Re: New 10 GbE USB adapters are cooler, smaller, cheaper

#138
post #38

Earlier quoted context omitted.

100 mode saved me once when I really really really needed to have a connection in that moment, but the ethernet cable glued to the wall that I was using had only three out of eight wires even functioning.

Don’t we need at least four for 100 Mbps?

According to the technician I spoke with, he could only detect three on their end.

The cable was chewed through by cats, so perhaps it was three just in that moment.

The connection was overall unreliable, so I guess it must have been four, just not all of the time.

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