USB hubs

I got this USB hub as a xmas present from my company. It has 7 USB ports
for different devices using USB like SD/MMC, M2, Micro SD and two other
weird looking ones. I don't know what they are used for, but I have 3
USB ports that work the same as the USB ports on the computer.

I can plug a USB stick into one of the 3 plugs on the hub, W7 detects
plug the hub into the computer and it sees it as a drive, it sees the
USB memory stick and I can access the files on the stick through the hub.

However, I plug in my USB hard drive into one of the ports like the USB
stick is using, the USB hard drive is not detected but the USB hard
drive has power.

Is the USB hard drive suppose to be seen and used through this USB hub
like the USB stick can be used?

On Wed, 21 Dec 2011 23:54:56 -0500, Big Steel <"The
SteelAAA"@SteelAAA.com> wrote:

>I got this USB hub as a xmas present from my company. It has 7 USB ports
>for different devices using USB like SD/MMC, M2, Micro SD and two other
>weird looking ones. I don't know what they are used for, but I have 3
>USB ports that work the same as the USB ports on the computer.

That's not a USB hub. That's a Multi Card Reader.

>I can plug a USB stick into one of the 3 plugs on the hub, W7 detects
>plug the hub into the computer and it sees it as a drive, it sees the
>USB memory stick and I can access the files on the stick through the hub.
>
>However, I plug in my USB hard drive into one of the ports like the USB
>stick is using, the USB hard drive is not detected but the USB hard
>drive has power.
>
>Is the USB hard drive suppose to be seen and used through this USB hub
>like the USB stick can be used?

A make and model of this device would help.
--
To reply via e-mail, remove The Obvious and .invalid from my e-mail address.

On 12/22/2011 12:01 AM, Evan Platt wrote:
> On Wed, 21 Dec 2011 23:54:56 -0500, Big Steel<"The
> SteelAAA"@SteelAAA.com> wrote:
>
>> I got this USB hub as a xmas present from my company. It has 7 USB ports
>> for different devices using USB like SD/MMC, M2, Micro SD and two other
>> weird looking ones. I don't know what they are used for, but I have 3
>> USB ports that work the same as the USB ports on the computer.
>
> That's not a USB hub. That's a Multi Card Reader.
>
>> I can plug a USB stick into one of the 3 plugs on the hub, W7 detects
>> plug the hub into the computer and it sees it as a drive, it sees the
>> USB memory stick and I can access the files on the stick through the hub.
>>
>> However, I plug in my USB hard drive into one of the ports like the USB
>> stick is using, the USB hard drive is not detected but the USB hard
>> drive has power.
>>
>> Is the USB hard drive suppose to be seen and used through this USB hub
>> like the USB stick can be used?
>
> A make and model of this device would help.

The company that made the USB mouse and this multi card reader is
called Xoopar out of China I found them on Google. The only products I
saw were the mouse stuff and no multi card reader. The instructions were
not in English with the my consulting company's logo stamped on the stuff.

I don't know where the 1 little page instruction sheet went that may
have had model numbers on it because there are none on the mouse or this
multi card reader. I got a nice ink pen too with the company logo on it.

Big Steel,
Is this the hub that you are talking about?
http://www.gizmowatch.com/entry/funk...y-card-reader/

1. The hub may not provide enough power to run the USB device properly. Even
though the device's indicator light blinks and the disc spins. USB sticks do
not require much power to run them.
2. Some USB devices, such as hdd's a CD/DVD-ROM drives cannot be run through
a USB hub, and must be run through the USB connectors of the PC, often times
the rear ones.

--
Rich/rerat
(RRR News) (message rule)
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--
Rich/rerat
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"Big Steel" <"The SteelAAA"@SteelAAA.com> wrote in message
news:...
I got this USB hub as a xmas present from my company. It has 7 USB ports
for different devices using USB like SD/MMC, M2, Micro SD and two other
weird looking ones. I don't know what they are used for, but I have 3
USB ports that work the same as the USB ports on the computer.

I can plug a USB stick into one of the 3 plugs on the hub, W7 detects
plug the hub into the computer and it sees it as a drive, it sees the
USB memory stick and I can access the files on the stick through the hub.

However, I plug in my USB hard drive into one of the ports like the USB
stick is using, the USB hard drive is not detected but the USB hard
drive has power.

Is the USB hard drive suppose to be seen and used through this USB hub
like the USB stick can be used?

On 22/12/2011 08:40, Rich/rerat wrote:
> Big Steel,
> Is this the hub that you are talking about?
> http://www.gizmowatch.com/entry/funk...y-card-reader/
>
> 1. The hub may not provide enough power to run the USB device properly. Even
> though the device's indicator light blinks and the disc spins. USB sticks do
> not require much power to run them.
> 2. Some USB devices, such as hdd's a CD/DVD-ROM drives cannot be run through
> a USB hub, and must be run through the USB connectors of the PC, often times
> the rear ones.
>

Mostly correct apart from the bit about rear sockets.

On 12/22/2011 3:40 AM, Rich/rerat wrote:
> Big Steel,
> Is this the hub that you are talking about?
> http://www.gizmowatch.com/entry/funk...y-card-reader/
>
> 1. The hub may not provide enough power to run the USB device properly. Even
> though the device's indicator light blinks and the disc spins. USB sticks do
> not require much power to run them.
> 2. Some USB devices, such as hdd's a CD/DVD-ROM drives cannot be run through
> a USB hub, and must be run through the USB connectors of the PC, often times
> the rear ones.
>
For interest, why does this restriction occur?

--


James Silverton, Potomac

I'm *not*

On 12/21/2011 10:41 PM, Big Steel wrote:
> On 12/22/2011 12:01 AM, Evan Platt wrote:
>> On Wed, 21 Dec 2011 23:54:56 -0500, Big Steel<"The
>> SteelAAA"@SteelAAA.com> wrote:
>>
>>> I got this USB hub as a xmas present from my company. It has 7 USB ports
>>> for different devices using USB like SD/MMC, M2, Micro SD and two other
>>> weird looking ones. I don't know what they are used for, but I have 3
>>> USB ports that work the same as the USB ports on the computer.
>>
>> That's not a USB hub. That's a Multi Card Reader.
>>
>>> I can plug a USB stick into one of the 3 plugs on the hub, W7 detects
>>> plug the hub into the computer and it sees it as a drive, it sees the
>>> USB memory stick and I can access the files on the stick through the
>>> hub.
>>>
>>> However, I plug in my USB hard drive into one of the ports like the USB
>>> stick is using, the USB hard drive is not detected but the USB hard
>>> drive has power.
>>>
>>> Is the USB hard drive suppose to be seen and used through this USB hub
>>> like the USB stick can be used?
>>
>> A make and model of this device would help.
>
> The company that made the USB mouse and this multi card reader is called
> Xoopar out of China I found them on Google. The only products I saw were
> the mouse stuff and no multi card reader. The instructions were not in
> English with the my consulting company's logo stamped on the stuff.
>
> I don't know where the 1 little page instruction sheet went that may
> have had model numbers on it because there are none on the mouse or this
> multi card reader. I got a nice ink pen too with the company logo on it.

Probably this one, or one like it.

http://www.gadgetshunter.com/index.p...&product_id=52

My guess on why your USB hard drive won't work is that there is not
enough power to the hub to run the drive and get the data. If you had a
powered USB hub, there most likely would not be a problem with the USB
drive.

--
Rumors are carried by haters, spread by fools,
and accepted by idiots.
"Anon"
http://www.bobhatch.com
http://www.tdsrvresort.com

James Silverton wrote:
> On 12/22/2011 3:40 AM, Rich/rerat wrote:
>> Big Steel,
>> Is this the hub that you are talking about?
>> http://www.gizmowatch.com/entry/funk...y-card-reader/
>>
>> 1. The hub may not provide enough power to run the USB device
>> properly. Even
>> though the device's indicator light blinks and the disc spins. USB
>> sticks do
>> not require much power to run them.
>> 2. Some USB devices, such as hdd's a CD/DVD-ROM drives cannot be run
>> through
>> a USB hub, and must be run through the USB connectors of the PC, often
>> times
>> the rear ones.
>>
> For interest, why does this restriction occur?
>

Passive hubs, have a 100mA per port limit. And that's because
the 500mA coming from the host, has to be split four or more ways.

Too much voltage drop in the cabling, means you can't stay within
the USB spec voltage margin. Adding a power adapter, down near
the "load end" of your USB tree, fixes that.

Active hubs (with their own power supply), can provide up
to 500mA per port (at least, up to the limitations of the
power supply itself). It's been some time, since an active
hub came with an adequate power supply. For example, a four
port hub you buy today, might come with a 5V 1 amp supply,
suited to run two ports at full power (500mA each). Maybe
one 2.5" hard drive can be used on such a thing, without
concern about it being able to spin up.

OK, this one comes pretty close. This is a seven port, with
a 5V 3A supply. Which means you can run six ports at 500mA each,
before the supply is a limitation. That's a bit better than
a four port with a 1 amp adapter.

http://www.amazon.com/Plugable-Port-...4563713&sr=8-2

Paul

On 12/22/2011 9:25 AM, Paul wrote:
> James Silverton wrote:
>> On 12/22/2011 3:40 AM, Rich/rerat wrote:
>>> Big Steel,
>>> Is this the hub that you are talking about?
>>> http://www.gizmowatch.com/entry/funk...y-card-reader/
>>>
>>> 1. The hub may not provide enough power to run the USB device
>>> properly. Even
>>> though the device's indicator light blinks and the disc spins. USB
>>> sticks do
>>> not require much power to run them.
>>> 2. Some USB devices, such as hdd's a CD/DVD-ROM drives cannot be run
>>> through
>>> a USB hub, and must be run through the USB connectors of the PC,
>>> often times
>>> the rear ones.
>>>
>> For interest, why does this restriction occur?
>>
>
> Passive hubs, have a 100mA per port limit. And that's because
> the 500mA coming from the host, has to be split four or more ways.
>
> Too much voltage drop in the cabling, means you can't stay within
> the USB spec voltage margin. Adding a power adapter, down near
> the "load end" of your USB tree, fixes that.
>
> Active hubs (with their own power supply), can provide up
> to 500mA per port (at least, up to the limitations of the
> power supply itself). It's been some time, since an active
> hub came with an adequate power supply. For example, a four
> port hub you buy today, might come with a 5V 1 amp supply,
> suited to run two ports at full power (500mA each). Maybe
> one 2.5" hard drive can be used on such a thing, without
> concern about it being able to spin up.
>
> OK, this one comes pretty close. This is a seven port, with
> a 5V 3A supply. Which means you can run six ports at 500mA each,
> before the supply is a limitation. That's a bit better than
> a four port with a 1 amp adapter.
>
> http://www.amazon.com/Plugable-Port-...4563713&sr=8-2
>
>
> Paul

Thanks! Sounds most reasonable. I used to have trouble even with powered
hubs on my previous machine. The present one has six USB ports, two on
the front.

--


James Silverton, Potomac

I'm *not*

On 12/22/2011 3:40 AM, Rich/rerat wrote:
> Big Steel,
> Is this the hub that you are talking about?
> http://www.gizmowatch.com/entry/funk...y-card-reader/
>
> 1. The hub may not provide enough power to run the USB device properly. Even
> though the device's indicator light blinks and the disc spins. USB sticks do
> not require much power to run them.
> 2. Some USB devices, such as hdd's a CD/DVD-ROM drives cannot be run through
> a USB hub, and must be run through the USB connectors of the PC, often times
> the rear ones.
>

Yes that's the USB device. Thanks for the info. Is there any device that
can drive the my USB HD.