USB hub SNAFUs

Don Y · 2012-03-30T07:29:26+00:00

Hi,I was connecting another 4 port USB hub to a machinetonight "identical" to one already in service, there.Once in place (and operated in the same fashion asits sibling predecessor), it failed to operate asexpected! (i.e., PC wouldn't enumerate any of thedrives attached).Suspecting the hub might be bad, I tested it elsewhere.Replaced cables. Added external power source. etc.Works like a champ on another machine (with differentdevices dangling off of it).[remember, "old" hub still works fine on the machineof interest]Tried a *second* hub (which is actually the *third* ofthis type being discussed) with similar absence of joy.After enumerating the behaviors of the three differenthubs (one "good", two "bad" -- yet all *functional*),I took a peek inside. Of course, different chipsetin the good vs. bad ones. Aside from an intellectual curiosity, this isnot a real issue for me *personally*. I'll just pick upanother couple of hubs.But, I had been debating what to use for external interconnectson a high volume project. USB (host) *seemed* the naturalchoice. It's always "just worked" (for me) in the past!In light of this little experience, I started thinking abouthow I would respond to a customer making the claim that *my*device "wasn't working" -- when he attached (this particular)hub/device. Yet, *swearing* to me that these things workedproperly "elsewhere".I've been giving serious thought to using ZigBee/BT forexternal device connections as it offers several otheradvantages over USB (no wire tangles, longer "virtual" wires,no cables to keep track of, no connectors poking throughthe case, no galvanic paths back *into* the device, noconcerns about supplying "enough" power to the externaldevices, etc.). Of course, the ubiquity of USB and thehuge cost advantage have (previously) been weighing againstthe wireless approach. :

USB hub SNAFUs

Mar 30, 2012 25 Replies

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Joel Koltner 14 years ago

Mmm... I don't think many mainstream oscilloscopes have SDHC readers built-in?

...but of course you can find ultra-tiny USB to SDHC converters...

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miso 14 years ago

When did I say Linksys wasn't owned by Cisco?

The designs on the consumer grade stuff are still ODMd, but firmware comes from Linksys. That was why they bought Linksys in the first place. They needed a different business model to get into the consumer router market. Cisco was already making routers at the time, but not with that business model.

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Archimedes' Lever 14 years ago

So F*CK OFF AND DIE, you retarded KOOK!

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Klinger 14 years ago

Flash drive slots? Yeah, newer jobs do.

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Pomegranate Bastard 14 years ago

Beautifully put, Mr Nymbecile. Have a nice day!

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josephkk 14 years ago

=20

Actually no, Linksys uses a lot of FOSS. The others likely do also.

?-)

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