Problems with identical USB 2.0 devices

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Archived from groups: microsoft.public.windowsxp.hardware (More info?)

I need to copy (professionally) memory cards. (Sony duo cards)
So I need to connect at least 5 usb card readers.
As I bought the same readers, most of the time when I connect them I will
get a blue screen after connecting the third or fourth reader and windows
shuts down and restarts.
Theorethecal it should be possible to connect 127 USB devices on 1 USB port.
Does anyone know How I can solve my problems?
Many thanks in advance.
--
Kind regards,
Fred P
 
G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

The USB devices all draw power from the USB ports. If the USB ports can not
provide the complete power requirements, this may cause your problem. In
order to connect 127 devices to a USB ports, you would need to also supply
the extra power that is required. The easiest way to do this is to connect
powered USB hubs (USB hubs that come with their own power supply). Have you
considered trying this???


"Fred P" <FredP@discussions.microsoft.com> wrote in message
news:D912FA80-47B2-47FD-A5A7-F10F3593D1E8@microsoft.com...
>I need to copy (professionally) memory cards. (Sony duo cards)
> So I need to connect at least 5 usb card readers.
> As I bought the same readers, most of the time when I connect them I will
> get a blue screen after connecting the third or fourth reader and windows
> shuts down and restarts.
> Theorethecal it should be possible to connect 127 USB devices on 1 USB
> port.
> Does anyone know How I can solve my problems?
> Many thanks in advance.
> --
> Kind regards,
> Fred P
 
G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Yes, I have tried using powered USB hubs but that does not make any difference.
Maybe I should try as many different "brands" (manufacturies) as possible.
Perhaps Windows sees the readers then as different.
--
Kind regards,
Fred P


"Yves Leclerc" wrote:

> The USB devices all draw power from the USB ports. If the USB ports can not
> provide the complete power requirements, this may cause your problem. In
> order to connect 127 devices to a USB ports, you would need to also supply
> the extra power that is required. The easiest way to do this is to connect
> powered USB hubs (USB hubs that come with their own power supply). Have you
> considered trying this???
>
>
> "Fred P" <FredP@discussions.microsoft.com> wrote in message
> news:D912FA80-47B2-47FD-A5A7-F10F3593D1E8@microsoft.com...
> >I need to copy (professionally) memory cards. (Sony duo cards)
> > So I need to connect at least 5 usb card readers.
> > As I bought the same readers, most of the time when I connect them I will
> > get a blue screen after connecting the third or fourth reader and windows
> > shuts down and restarts.
> > Theorethecal it should be possible to connect 127 USB devices on 1 USB
> > port.
> > Does anyone know How I can solve my problems?
> > Many thanks in advance.
> > --
> > Kind regards,
> > Fred P
>
>
>
 
G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

If you connect too many USB devices to one port you may be overloading the
port. It can supply only so much current without sustaining damage.

If each device had an external power supply you "should?" be able to daisy
chain (connect) up to 127 devices without problems. Remember, the current to
feed these devices may be going through a "trace" on the motherboard that is
slightly larger than a human hair. It can't carry much!

Try connecting the devices to different ports or get a powered USB 2.0
external hub.


--
Regards,

Richard Urban
Microsoft MVP Windows Shell/User

Quote from: George Ankner
"If you knew as much as you thought you know,
You would realize that you don't know what you thought you knew!"

"Fred P" <FredP@discussions.microsoft.com> wrote in message
news:D912FA80-47B2-47FD-A5A7-F10F3593D1E8@microsoft.com...
>I need to copy (professionally) memory cards. (Sony duo cards)
> So I need to connect at least 5 usb card readers.
> As I bought the same readers, most of the time when I connect them I will
> get a blue screen after connecting the third or fourth reader and windows
> shuts down and restarts.
> Theorethecal it should be possible to connect 127 USB devices on 1 USB
> port.
> Does anyone know How I can solve my problems?
> Many thanks in advance.
> --
> Kind regards,
> Fred P
 
G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

I have used powered USB hubs and I tried a PCI USB 4 port hub as well.
Makes no difference.
--
Kind regards,
Fred P


"Richard Urban [MVP]" wrote:

> If you connect too many USB devices to one port you may be overloading the
> port. It can supply only so much current without sustaining damage.
>
> If each device had an external power supply you "should?" be able to daisy
> chain (connect) up to 127 devices without problems. Remember, the current to
> feed these devices may be going through a "trace" on the motherboard that is
> slightly larger than a human hair. It can't carry much!
>
> Try connecting the devices to different ports or get a powered USB 2.0
> external hub.
>
>
> --
> Regards,
>
> Richard Urban
> Microsoft MVP Windows Shell/User
>
> Quote from: George Ankner
> "If you knew as much as you thought you know,
> You would realize that you don't know what you thought you knew!"
>
> "Fred P" <FredP@discussions.microsoft.com> wrote in message
> news:D912FA80-47B2-47FD-A5A7-F10F3593D1E8@microsoft.com...
> >I need to copy (professionally) memory cards. (Sony duo cards)
> > So I need to connect at least 5 usb card readers.
> > As I bought the same readers, most of the time when I connect them I will
> > get a blue screen after connecting the third or fourth reader and windows
> > shuts down and restarts.
> > Theorethecal it should be possible to connect 127 USB devices on 1 USB
> > port.
> > Does anyone know How I can solve my problems?
> > Many thanks in advance.
> > --
> > Kind regards,
> > Fred P
>
>
>
 
G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Then I would say that it is the fault of the devices not being individually
identified, as hard drives are. Each hard drive has it's own designator
(I.D.) so that the O/S can differentiate one from one another. Maybe the
manufacturers of the devices you are using have not thought this far in
advance and only expect one device to be used at a time.

--
Regards,

Richard Urban
Microsoft MVP Windows Shell/User

Quote from: George Ankner
"If you knew as much as you thought you know,
You would realize that you don't know what you thought you knew!"

"Fred P" <FredP@discussions.microsoft.com> wrote in message
news:EA483FF5-B599-4503-9909-7AB6858D005D@microsoft.com...
>I have used powered USB hubs and I tried a PCI USB 4 port hub as well.
> Makes no difference.
> --
> Kind regards,
> Fred P
>
>
> "Richard Urban [MVP]" wrote:
>
>> If you connect too many USB devices to one port you may be overloading
>> the
>> port. It can supply only so much current without sustaining damage.
>>
>> If each device had an external power supply you "should?" be able to
>> daisy
>> chain (connect) up to 127 devices without problems. Remember, the current
>> to
>> feed these devices may be going through a "trace" on the motherboard that
>> is
>> slightly larger than a human hair. It can't carry much!
>>
>> Try connecting the devices to different ports or get a powered USB 2.0
>> external hub.
>>
>>
>> --
>> Regards,
>>
>> Richard Urban
>> Microsoft MVP Windows Shell/User
>>
>> Quote from: George Ankner
>> "If you knew as much as you thought you know,
>> You would realize that you don't know what you thought you knew!"
>>
>> "Fred P" <FredP@discussions.microsoft.com> wrote in message
>> news:D912FA80-47B2-47FD-A5A7-F10F3593D1E8@microsoft.com...
>> >I need to copy (professionally) memory cards. (Sony duo cards)
>> > So I need to connect at least 5 usb card readers.
>> > As I bought the same readers, most of the time when I connect them I
>> > will
>> > get a blue screen after connecting the third or fourth reader and
>> > windows
>> > shuts down and restarts.
>> > Theorethecal it should be possible to connect 127 USB devices on 1 USB
>> > port.
>> > Does anyone know How I can solve my problems?
>> > Many thanks in advance.
>> > --
>> > Kind regards,
>> > Fred P
>>
>>
>>
 
G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

That is correct, you could have the same problem when you try to connect 2
identical CDRW 's
--
Kind regards,
Fred P


"Richard Urban [MVP]" wrote:

> Then I would say that it is the fault of the devices not being individually
> identified, as hard drives are. Each hard drive has it's own designator
> (I.D.) so that the O/S can differentiate one from one another. Maybe the
> manufacturers of the devices you are using have not thought this far in
> advance and only expect one device to be used at a time.
>
> --
> Regards,
>
> Richard Urban
> Microsoft MVP Windows Shell/User
>
> Quote from: George Ankner
> "If you knew as much as you thought you know,
> You would realize that you don't know what you thought you knew!"
>
> "Fred P" <FredP@discussions.microsoft.com> wrote in message
> news:EA483FF5-B599-4503-9909-7AB6858D005D@microsoft.com...
> >I have used powered USB hubs and I tried a PCI USB 4 port hub as well.
> > Makes no difference.
> > --
> > Kind regards,
> > Fred P
> >
> >
> > "Richard Urban [MVP]" wrote:
> >
> >> If you connect too many USB devices to one port you may be overloading
> >> the
> >> port. It can supply only so much current without sustaining damage.
> >>
> >> If each device had an external power supply you "should?" be able to
> >> daisy
> >> chain (connect) up to 127 devices without problems. Remember, the current
> >> to
> >> feed these devices may be going through a "trace" on the motherboard that
> >> is
> >> slightly larger than a human hair. It can't carry much!
> >>
> >> Try connecting the devices to different ports or get a powered USB 2.0
> >> external hub.
> >>
> >>
> >> --
> >> Regards,
> >>
> >> Richard Urban
> >> Microsoft MVP Windows Shell/User
> >>
> >> Quote from: George Ankner
> >> "If you knew as much as you thought you know,
> >> You would realize that you don't know what you thought you knew!"
> >>
> >> "Fred P" <FredP@discussions.microsoft.com> wrote in message
> >> news:D912FA80-47B2-47FD-A5A7-F10F3593D1E8@microsoft.com...
> >> >I need to copy (professionally) memory cards. (Sony duo cards)
> >> > So I need to connect at least 5 usb card readers.
> >> > As I bought the same readers, most of the time when I connect them I
> >> > will
> >> > get a blue screen after connecting the third or fourth reader and
> >> > windows
> >> > shuts down and restarts.
> >> > Theorethecal it should be possible to connect 127 USB devices on 1 USB
> >> > port.
> >> > Does anyone know How I can solve my problems?
> >> > Many thanks in advance.
> >> > --
> >> > Kind regards,
> >> > Fred P
> >>
> >>
> >>
>
>
>
 
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