USB 2.0 device-hub problem


E

eyenstine

I have been struggling for many hours on this.

I have a Toshiba Satellite A75-S213, equipped with USB 2.0 (I've
confirmed this)
Under Device Manager, I DO have an "Enhanced" pci to usb host
controller.
I have Windows Service Pack 2 (my computer came with this installed.)

I recently purhcased an external hard drive, a "Kaser 250 gb
StorageVault". It has a USB 2.0 interface (with max transfer speeds up
to 480 Mbps, as clearly stated on the box and online.)

Now, when I plug this into any one (3 in total) of my USB ports, I get
a notification saying that a "High speed device is connected to a non-
high speed port, and will function at reduced speeds". It then tells
me to switch to a port that DOES enable High Speed, and provides me a
list of where these ports are on my computer. This is the confusing
part.

It says that i DO indeed have usb 2.0 ports on my computer which are
located here:
"Standard Enhanced pci to usb host controller-->Usb Root Hub, USB root
hub, etc. (6 of them)

So my external drive is functioning at 1.1 speeds.

Now, I downloaded a trial version of a program called USBinfo, which
maps out my USB controllers and ports, and indeed, i DO have a usb 2.0
controller. When i plug in a regular usb 2.0 flash memroy stick into
any of my ports, it shows that it is connected to a port under the 2.0
controller and functions at High speed. HOWEVER, whenver i plug my
external hard drive, the program shows that yes, the hard drive IS a
HIGH SPEED DEVICE, but is plugged into a LOW SPEED (1.1) USB PORT!!
and NOT the High speed port! I understand that computers with 2.0
abitliy have 3 usb controllers, one that is "enhanced", and 2 more
that are for 1.1 and 1.0 speeds. My external hard drive is just not
connecting to the 2.0 controller!! what do i do?? i have all the
drivers, and that is obvoius since my mp3 player, flash drives all are
able to function at 2.0 speeds and connect to the 2.0 controller!

Incase this is still confusing, in other words, computers shoudl be
able to detect usb 2.0 devices and should be automaticlaly governed by
the Enhanced usb controller. In my case, I have a usb 2.0 device that
is being controlled by a 1.1 controller! any help please?
 
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M

Mistoffolees

eyenstine said:
Incase this is still confusing, in other words, computers shoudl be
able to detect usb 2.0 devices and should be automaticlaly governed by
the Enhanced usb controller. In my case, I have a usb 2.0 device that
is being controlled by a 1.1 controller! any help please?

Tried inserting a powered USB 2.0 hub between the external drive and the
USB port? This might or might not be necessary, depending on the particular
USB external hard drive.
 
H

housetrained

eyenstine said:
I have been struggling for many hours on this.

I have a Toshiba Satellite A75-S213, equipped with USB 2.0 (I've
confirmed this)
Under Device Manager, I DO have an "Enhanced" pci to usb host
controller.
I have Windows Service Pack 2 (my computer came with this installed.)

I recently purhcased an external hard drive, a "Kaser 250 gb
StorageVault". It has a USB 2.0 interface (with max transfer speeds up
to 480 Mbps, as clearly stated on the box and online.)

Now, when I plug this into any one (3 in total) of my USB ports, I get
a notification saying that a "High speed device is connected to a non-
high speed port, and will function at reduced speeds". It then tells
me to switch to a port that DOES enable High Speed, and provides me a
list of where these ports are on my computer. This is the confusing
part.

It says that i DO indeed have usb 2.0 ports on my computer which are
located here:
"Standard Enhanced pci to usb host controller-->Usb Root Hub, USB root
hub, etc. (6 of them)

So my external drive is functioning at 1.1 speeds.

Now, I downloaded a trial version of a program called USBinfo, which
maps out my USB controllers and ports, and indeed, i DO have a usb 2.0
controller. When i plug in a regular usb 2.0 flash memroy stick into
any of my ports, it shows that it is connected to a port under the 2.0
controller and functions at High speed. HOWEVER, whenver i plug my
external hard drive, the program shows that yes, the hard drive IS a
HIGH SPEED DEVICE, but is plugged into a LOW SPEED (1.1) USB PORT!!
and NOT the High speed port! I understand that computers with 2.0
abitliy have 3 usb controllers, one that is "enhanced", and 2 more
that are for 1.1 and 1.0 speeds. My external hard drive is just not
connecting to the 2.0 controller!! what do i do?? i have all the
drivers, and that is obvoius since my mp3 player, flash drives all are
able to function at 2.0 speeds and connect to the 2.0 controller!

Incase this is still confusing, in other words, computers shoudl be
able to detect usb 2.0 devices and should be automaticlaly governed by
the Enhanced usb controller. In my case, I have a usb 2.0 device that
is being controlled by a 1.1 controller! any help please?

This Kaser should be mains powered, you definitely have it plugged in AND
switched on?
 
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T

Thomas Wendell

Change USB-cable??
I have been struggling for many hours on this.

I have a Toshiba Satellite A75-S213, equipped with USB 2.0 (I've
confirmed this)
Under Device Manager, I DO have an "Enhanced" pci to usb host
controller.
I have Windows Service Pack 2 (my computer came with this installed.)

I recently purhcased an external hard drive, a "Kaser 250 gb
StorageVault". It has a USB 2.0 interface (with max transfer speeds up
to 480 Mbps, as clearly stated on the box and online.)

Now, when I plug this into any one (3 in total) of my USB ports, I get
a notification saying that a "High speed device is connected to a non-
high speed port, and will function at reduced speeds". It then tells
me to switch to a port that DOES enable High Speed, and provides me a
list of where these ports are on my computer. This is the confusing
part.

It says that i DO indeed have usb 2.0 ports on my computer which are
located here:
"Standard Enhanced pci to usb host controller-->Usb Root Hub, USB root
hub, etc. (6 of them)

So my external drive is functioning at 1.1 speeds.

Now, I downloaded a trial version of a program called USBinfo, which
maps out my USB controllers and ports, and indeed, i DO have a usb 2.0
controller. When i plug in a regular usb 2.0 flash memroy stick into
any of my ports, it shows that it is connected to a port under the 2.0
controller and functions at High speed. HOWEVER, whenver i plug my
external hard drive, the program shows that yes, the hard drive IS a
HIGH SPEED DEVICE, but is plugged into a LOW SPEED (1.1) USB PORT!!
and NOT the High speed port! I understand that computers with 2.0
abitliy have 3 usb controllers, one that is "enhanced", and 2 more
that are for 1.1 and 1.0 speeds. My external hard drive is just not
connecting to the 2.0 controller!! what do i do?? i have all the
drivers, and that is obvoius since my mp3 player, flash drives all are
able to function at 2.0 speeds and connect to the 2.0 controller!

Incase this is still confusing, in other words, computers shoudl be
able to detect usb 2.0 devices and should be automaticlaly governed by
the Enhanced usb controller. In my case, I have a usb 2.0 device that
is being controlled by a 1.1 controller! any help please?

--
Tumppi
=================================
A lot learned from these newsgroups
Helsinki, FINLAND
(translations from/to FI not always accurate
=================================
 

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