Re: Number of USB devices limited?

Please notice that this controller on eBay already have one or even two habs (or something like this)
Only two ports connected directly.
It will be nice to see topology report from someone who poses one of this.

20 апреля 2022 г. 16:24:47 GMT+03:00, Tomek CEDRO <tomek@cedro.info> пишет:
>On Wed, Apr 20, 2022 at 2:33 PM Brian McGovern (bmcgover)
><bmcgover@cisco.com> wrote:
>> That is _always_ a problem with USB, since they're hot pluggable. Some nice folks here on the mailing list put some devd scripts together to map the FTDI cable's serial number in to the device name, so while the /dev/cuaU_X_ names still come up not-quite-randomly, I also get /dev/cu.ABCDEFG, where ABCDEFG = The serial number of the cable, which is consistent as long as you don't change the cable.
>
>Yup :-) Also most utilities can use SN as the device identifier in
>place of a serial port device :-)
>
>
>> At this point, the only headache is that I start getting the errors in the low 20s of ports, and I'm trying to avoid two hosts/rack.
>
>How about additional PCI-E USB controller(s)? :-)
>
>Example: https://www.ebay.com/itm/255027113337
>
>Just note the PCI-E x1 x2 x4 x8 x16 and the Chipset throughput limit
>if that is important :-)
>
>https://en.wikipedia.org/wiki/PCI_Express
>
>I have replaced a mainboard recently just to get more fast PCI-E
>slots.. you can buy really decent second-hand hardware for a very good
>price nowadays :-)
>
>-- 
>CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
>