Date: Fri, 22 Apr 2022 08:46:47 +0300 From: Kira <nyakov13@gmail.com> To: questions@freebsd.org Subject: Re: Number of USB devices limited? Message-ID: <42DAC3B3-7FDA-4B56-8A5B-45E687946522@gmail.com> In-Reply-To: <CAFYkXjkMGxSGxXe_AR7dqftOTFFdvMR7cb3L%2B8-v%2BNWbsULTZA@mail.gmail.com> References: <BL1PR11MB550957CB5932655D66799676C5F29@BL1PR11MB5509.namprd11.prod.outlook.com> <alpine.BSF.2.20.2204192304410.2458@tripel.monochrome.org> <92560B47-41A7-4DBA-A444-FDF67D552FFE@gushi.org> <BL1PR11MB5509E452349D0E6EC34CB106C5F59@BL1PR11MB5509.namprd11.prod.outlook.com> <CAFYkXjkMGxSGxXe_AR7dqftOTFFdvMR7cb3L%2B8-v%2BNWbsULTZA@mail.gmail.com>
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------WNE9JV7DUKQUBBV6Z7CRDW6EAPWJX3 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Please notice that this controller on eBay already have one or even two hab= s (or something like this) Only two ports connected directly=2E It will be nice to see topology report from someone who poses one of this= =2E 20 =D0=B0=D0=BF=D1=80=D0=B5=D0=BB=D1=8F 2022 =D0=B3=2E 16:24:47 GMT+03:00,= Tomek CEDRO <tomek@cedro=2Einfo> =D0=BF=D0=B8=D1=88=D0=B5=D1=82: >On Wed, Apr 20, 2022 at 2:33 PM Brian McGovern (bmcgover) ><bmcgover@cisco=2Ecom> wrote: >> That is _always_ a problem with USB, since they're hot pluggable=2E Som= e 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/cu= aU_X_ names still come up not-quite-randomly, I also get /dev/cu=2EABCDEFG,= where ABCDEFG =3D The serial number of the cable, which is consistent as l= ong as you don't change the cable=2E > >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=2E > >How about additional PCI-E USB controller(s)? :-) > >Example: https://www=2Eebay=2Ecom/itm/255027113337 > >Just note the PCI-E x1 x2 x4 x8 x16 and the Chipset throughput limit >if that is important :-) > >https://en=2Ewikipedia=2Eorg/wiki/PCI_Express > >I have replaced a mainboard recently just to get more fast PCI-E >slots=2E=2E you can buy really decent second-hand hardware for a very goo= d >price nowadays :-) > >--=20 >CeDeROM, SQ7MHZ, http://www=2Etomek=2Ecedro=2Einfo > ------WNE9JV7DUKQUBBV6Z7CRDW6EAPWJX3 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head></head><body>Please notice that this controller on eBay already= have one or even two habs (or something like this)<br>Only two ports conne= cted directly=2E<br>It will be nice to see topology report from someone who= poses one of this=2E<br><br><div class=3D"gmail_quote">20 =D0=B0=D0=BF=D1= =80=D0=B5=D0=BB=D1=8F 2022 =D0=B3=2E 16:24:47 GMT+03:00, Tomek CEDRO <to= mek@cedro=2Einfo> =D0=BF=D0=B8=D1=88=D0=B5=D1=82:<blockquote class=3D"gm= ail_quote" style=3D"margin: 0pt 0pt 0pt 0=2E8ex; border-left: 1px solid rgb= (204, 204, 204); padding-left: 1ex;"> <pre dir=3D"auto" class=3D"k9mail">On Wed, Apr 20, 2022 at 2:33 PM Brian M= cGovern (bmcgover)<br><bmcgover@cisco=2Ecom> wrote:<br><blockquote cl= ass=3D"gmail_quote" style=3D"margin: 0pt 0pt 1ex 0=2E8ex; border-left: 1px = solid #729fcf; padding-left: 1ex;">That is _always_ a problem with USB, sin= ce they're hot pluggable=2E Some nice folks here on the mailing list put so= me devd scripts together to map the FTDI cable's serial number in to the de= vice name, so while the /dev/cuaU_X_ names still come up not-quite-randomly= , I also get /dev/cu=2EABCDEFG, where ABCDEFG =3D The serial number of the = cable, which is consistent as long as you don't change the cable=2E<br></bl= ockquote><br>Yup :-) Also most utilities can use SN as the device identifie= r in<br>place of a serial port device :-)<br><br><br><blockquote class=3D"g= mail_quote" style=3D"margin: 0pt 0pt 1ex 0=2E8ex; border-left: 1px solid #7= 29fcf; padding-left: 1ex;">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 ho= sts/rack=2E<br></blockquote><br>How about additional PCI-E USB controller(s= )? :-)<br><br>Example: <a href=3D"https://www=2Eebay=2Ecom/itm/255027113337= ">https://www=2Eebay=2Ecom/itm/255027113337</a><br><br>Just note the PCI-E = x1 x2 x4 x8 x16 and the Chipset throughput limit<br>if that is important :-= )<br><br><a href=3D"https://en=2Ewikipedia=2Eorg/wiki/PCI_Express">https://= en=2Ewikipedia=2Eorg/wiki/PCI_Express</a><br><br>I have replaced a mainboar= d recently just to get more fast PCI-E<br>slots=2E=2E you can buy really de= cent second-hand hardware for a very good<br>price nowadays :-)<br><br><div= class=3D"k9mail-signature">-- <br>CeDeROM, SQ7MHZ, <a href=3D"http://www= =2Etomek=2Ecedro=2Einfo">http://www=2Etomek=2Ecedro=2Einfo</a><br><br></div= ></pre></blockquote></div></body></html> ------WNE9JV7DUKQUBBV6Z7CRDW6EAPWJX3--
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