Re: External drives not installing or working properly on USB


"Simon" <Simon@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:78748873-6B78-409E-90D2-74678B8947AC@xxxxxxxxxxxxxxxx
I have a graphics workstation based around an Intel D975XBX2 motherboard
with
quad core processor and 3GB RAM. USB host controllers are Intel 82801G
(ICH7
Family). Only one of the five host controllers is connected to the 6
external
ports. This is listed as a USB2 enhanced host controller.


This is not correct. As you have 5 host ports, you have 8 physical USB
ports (and as you note 6 are brought to the outside world). 4 of the host
ports are OHCI host ports and provide the slow and fast communication to 2
each (making 8 in all) of the physical ports (what most people call USB1).
The remaining host is a EHCI host providing high speed communication to all
8 physical ports (usually refered to as USB2). There are very good
technical reasons for this apparently cockermainy arrangement.

All your other symptoms sound suspiciously like the OHCI ports on either the
host or peripheral having some problem. What is not clear is: do they not
work on any port on the PC? When you say yhey work under Vista, is this on
the same or a different PC?

You seem to be suggesting that your problems appeared after upgrading the
SP3. I assume that you don't have the ability to restore a backup of the
SP2 system before you upgraded to SP3 (very bad and unwise move) otherwise
you would have restored it. This may sound a bit drastic, but if you have
an old or another hard disk, are you able to rebuild a windows SP2
installation, and does it work with USB? This last bit would confirm
whether the hardware was OK and if the support software drivers have become
damaged.

I am experiencing problems with a Sandisk ImageMate 12 in 1 card reader
modelSDDR-89 V4 and a Western Digital 2TB external mirror raid drive, both
USB2 peripherals.

Both were bought at the same time and shortly after I had installed XP
SP3.
Plug and play installation of the WD drive went through most of the
automated
process before indicating that the drevice had not installed correctly. No
external drive was recognised. The computer froze completely while trying
to
install the Sandisk card reader.

I scanned the system and identified some old drivers. All relevant
hardware
and XP drivers were checked and updated where necessary. BIOS was also out
of
date so this was also brought up to date. No change.

All the USB controllers were removed via the device manager and the system
allowed to reinstall them - no change.

The USB root hub has been checked. 8 ports are available in total of which
6
are actually physically available. An External hub is connected to one
port
and supports the keyboard and mouse. This draws 500mA. A second port
connects
to a printer switch and draws from 2 to 10mA in operation. Each port is
rated
at 500mA and there is no indication that too much is being drawn on any
particular port.

The operating system was rolled back to SP2 and the checks above repeated.
Now the Sandisk drive installs but it can take up to 5 minutes for the
operating system to recognise the four additional 'drives'. It then tries
to
autoplay, even with no card in the reader. This does not cancel and can go
on
for another 5 minutes.

The WD drive still does not install.

I have the same problems on a laptop, also running XP. I got the WD drive
to
come up on this machine once when rolled back to SP2 but it disappeared
after
rebooting and has never been seen again. This machine also uses Intel host
controllers but a slightly older chipset.

All the external hardware works fine under Vista (and fast too). Microsoft
say it's a hardware problem.

I am out of ideas.


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