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A comment on Raspberry Pi 4. Parent comment

Re:Raspberry Pi 4 by tmikaeld on Monday June 24, 2019 @05:47AM (#20261844)
Which means, 2 ports and two drives (not ssd) should give at least 100MB/s each. Maybe I wasn't clear enough on that.

- 1Gbit ethernet

- 1Gbit USB 3.0 port 1

- 1Gbit USB 3.0 Port 2

Total: 3Gbit of 4Gbit, having some margin to spare.

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Re:Raspberry Pi 4 by fanf2 on Monday June 24, 2019 @06:39AM (#20262075)
The Ethernet is directly connected to the SoC, it doesn't share the 4Gbit PCIe with the USB ports
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Re:Raspberry Pi 4 by dotancohen on Monday June 24, 2019 @08:02AM (#20262611)
On the older RPIs the ethernet was connected via the USB ports, so I understand GP's stance.
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Re:Raspberry Pi 4 by morphle on Monday June 24, 2019 @09:00AM (#20263097)
It has:

1 Gbit Ethernet over RGMII

4 Gbit PCIe Gen 2 shared by 2 USB 3.0 (so 1x 4 gbps max or 2 x 2 Gbps shared)

Total: 5 Gbits, no margin to spare

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Re:Raspberry Pi 4 by kllrnohj on Monday June 24, 2019 @12:38PM (#20265414)
> or 2 x 2 Gbps shared

Only if both drives are saturated at the same time. But since the context here is a NAS usage, there's a max 1gbps upstream/downstream in the first place so you could comfortably do a 4 drive mirror NAS off of this and not have any bottlenecks on the USB 3.0 -> SATA side of things.

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