On Jun 28, 8:51*am, Paul <nos...@needed.com> wrote:
> Roy wrote:
> > On Jun 23, 8:03 am, Paul <nos...@needed.com> wrote:
> >> Roy wrote:
> >>> On Jun 22, 6:50 pm, Paul <nos...@needed.com> wrote:
> >>>> Roy wrote:
> >>>>> On Jun 22, 4:04 pm, Paul <nos...@needed.com> wrote:
> >>>>>> Roy wrote:
> >>>>>>> Hello group
> >>>>>>> Recently I *was dismayed why my USB drive was not recognized anymore
> >>>>>>> by window explorer. Therefore if I *plug it on the USB slot it does
> >>>>>>> nothing. I searched the web for some ideas and came from this fellow
> >>>>>>> which states:\
> >>>>>>> 'A user of a company I know recently told me the following experience
> >>>>>>> he had with a USB flash drive. The user traveled a lot and had a
> >>>>>>> laptop that he used to connect to the company's network when he was in
> >>>>>>> the office. And he was used to plugging his flash drive into the USB
> >>>>>>> slot on his laptop so he could transfer files to another machine he
> >>>>>>> used at home. But one day he came into the office, connected his
> >>>>>>> laptop to the network, plugged in the flash drive and nothing happened
> >>>>>>> -- normally an Explorer window would open displaying the contentsof
> >>>>>>> the drive. This was disconcerting, so he opened My Computer and
> >>>>>>> discovered that the USB drive wasn't there. Puzzled by this, he took
> >>>>>>> out another flash drive from his pocket and tried it, and this time it
> >>>>>>> worked fine so he knew at least the problem wasn't with his computer.
> >>>>>>> He was just about resigned to throwing out his first drive when he
> >>>>>>> decided to send me a quick email detailing the problem. My immediate
> >>>>>>> reaction too was that it was that the drive had failed, but then I
> >>>>>>> thought about it some more. One of the key steps in troubleshooting
> >>>>>>> problems is to ask what just happened. The drive failure had occurred
> >>>>>>> after he connected his machine to the network, so could it be an issue
> >>>>>>> with the network? I emailed back and suggested he disconnect his
> >>>>>>> laptop from the network and try the flash drive again, and a short
> >>>>>>> time later I received an email saying the drive now worked!
> >>>>>>> Then it dawned on me. I told him to remove the drive, connect to the
> >>>>>>> network and open My Computer again and look for something different.
> >>>>>>> He did this and told me there was a new mapped network drive thathe
> >>>>>>> hadn't seen before. Aha! The network administrator must have modified
> >>>>>>> their logon script to map a new drive on users' computers, and this
> >>>>>>> new mapped drive probably assigned the very same drive letter that
> >>>>>>> this particular user's laptop had previously assigned to his first USB
> >>>>>>> drive. I told him to plug the USB drive in again, open Computer
> >>>>>>> Management, and change the drive letter of the USB drive. He did this,
> >>>>>>> and right away an Explorer window opened displaying the contents of
> >>>>>>> his USB drive. Problem solved'
> >>>>>>> Since I have never done such things these ideas sound strange to me.
> >>>>>>> Meaning if the drive is malfunctioning it might have something todo
> >>>>>>> with such and not a hardware fault.
> >>>>>>> Although I was not using a laptop but just a desktop PC.
> >>>>>>> I did found the computer management ( local) and had viewed the disk
> >>>>>>> management on the right pane.
> >>>>>>> Indeed there are letters that indicates one drive say for example
> >>>>>>> Drive D and drive C which is easier tounderstand as well asthe Drive E
> >>>>>>> and F *and so forth. Previously the Flash drive was recognized as
> >>>>>>> Drive G and J as well as drive H for *another External hard drive.
> >>>>>>> But now it does not recognized my flash drive.
> >>>>>>> What I don't understand is why window explorer does not recognizemy
> >>>>>>> USB flash drive but still do with the other drives.
> >>>>>>> Early this morning I was plugging these drives to the networked
> >>>>>>> computer in the internet cafe and immediately it was not recognized
> >>>>>>> and this kept me worried so when I arrived home I immediately plugged
> >>>>>>> it and there the flash drive is not functioning or being recognized
> >>>>>>> anymore.
> >>>>>>> Could somebody offer me their advice how to sort this out
> >>>>>>> What is going on?
> >>>>>>> TIA
> >>>>>>> Roy
> >>>>>> Uwe Sieber has a web site, with that kind of information on it.
> >>>>>>http://www.uwe-sieber.de/usbtrouble_e.html
> >>>>>> *From a hardware perspective, you can verify that the plugged in
> >>>>>> device is being detected (communicated with), via UVCView program
> >>>>>> from Microsoft. (Use the upper right hand link, to download an
> >>>>>> executable for Windows 32 bit OS.) This is an archived web page,
> >>>>>> as Microsoft has taken down the download page. There have been
> >>>>>> several versions of programs that look like this one, and so far,
> >>>>>> this one is the most capable. (Some of the originals, had limits
> >>>>>> on the number of ports they could handle.)
> >>>>>>http://web.archive.org/web/200705160...crosoft.com/wh...
> >>>>>> If the physical layer is working, and the USB device can be
> >>>>>> enumerated, and fill the window with data, then the problem
> >>>>>> must be at a higher level in software. (In the picture here,
> >>>>>> you can see VID/PID 0x0ECD 0xA100 device has been detected, and
> >>>>>> the presence of the Endpoint Descriptor presumably means a
> >>>>>> communications path is set up.)
> >>>>>>http://www.die.de/blog/content/binary/usbview.png
> >>>>>> For resetting the USB stack, usbman.com has a page describing a
> >>>>>> procedure to do in safe mode. But this doesn't necessarily fix
> >>>>>> everything. There are also instances where a driver cache is
> >>>>>> corrupted, or the registry is locked to updates, that might
> >>>>>> cause a procedure like this to not fix anything. But in those
> >>>>>> cases, searching on the exact error text, will likely lead you
> >>>>>> in the right direction.
> >>>>>>http://www.usbman.com/Guides/Cleanup...%20Safe%20Mode...
> >>>>>> HTH,
> >>>>>> * * *Paul- Hide quoted text -
> >>>>>> - Show quoted text -
> >>>>> Thanks !. sounds complicated and Microsoft is cautious about
> >>>>> installing hotfixes which may not be the solution to the problem
> >>>>> I did try to follow a certain procedure
> >>>>>http://www.port-huron.k12.mi.us/tech...bflashdrivetro...
> >>>>> But it when I right my computer- choose manage- Storage- disk
> >>>>> management
> >>>>> Then I right clicked the listed removable disk then change drive
> >>>>> letter and paths
> >>>>> And want to assign a new drive letter.
> >>>>> I was given a warning that *changing the drive letter might cause
> >>>>> problem that the hardware connected might no longer run so *stopped
> >>>>> there.
> >>>>> I also tried to create another drive letter but it says the letter was
> >>>>> not recognized.
> >>>>> Creating a new folder *needs that you need another path, but whenI
> >>>>> browsed I only find that there are two path- the C and D drive.
> >>>>> So I got lost here and would need some suggestion from people that are
> >>>>> familiar with this methods.
> >>>>> Thank You!
> >>>> Have a look at this page. The Drive Letter Manager
> >>>> might be able to change a USB drive letter for you.
> >>>> I haven't used it, because I don't have any USB flash
> >>>> devices here.
> >>>>http://www.uwe-sieber.de/usbdlm_e.html
> >>>> * * Paul- Hide quoted text -
> >>>> - Show quoted text -
> >>> Thanks, I will have to read first the literature about its use.
> >>> BTW, is there anybody here have experience about USB drive
> >>> overvoltage? What I mean I am not discounting the fact that the
> >>> desktopPc might have fried circuitry *and this is an additional worry
> >>> for me. I was thinking that *some computers might have higher USB
> >>> voltage rating for USBs than laptops?
> >>> Is there a likelihood for such to happen?
> >>> I just hope that this hardware is still intact...
> >> The USB connector consists of +5V, GND, D+, and D-. Two power
> >> signals and two data signals. The power level is a standard, whether
> >> desktop or laptop. A high power device may draw up to 500mA of
> >> current, and the total maximum power of 2.5 watts is just enough
> >> to operate a modern 2.5" hard drive.
>
> >> A USB device can be damaged by handling, such as dropped and broken.
> >> Or static discharge could damage a device. But the
> >> operating voltage should be the same on each computer. And
> >> the connectors seem to be well designed, at least compared to
> >> some more problematic connectors (Firewire).
>
> >> The reason I wanted you to use UVCView, is to see if any low
> >> level communication was happening or not. If there are no
> >> endpoints and no enumeration data being shown, for a plugged
> >> in USB device, it could be a hardware issue. If the right hand
> >> window in UVCView has data in it, then there is hope that the
> >> USB device is not completely dead.
>
> >> The foreign computer could also have malware or a virus on it,
> >> and a software like that might erase the flash device. I suppose
> >> a device could be "killed" by being reconfigured, but I don't understand
> >> how those tools work. It is possible to change the declared size
> >> of a USB flash device (fraudsters on Ebay do that), so there is
> >> some kind of interface to USB flash sticks, that hackers understand.
>
> >> The only "frying" I've heard of, is Intel ICH5/ICH5R Southbridge
> >> chips, can have their USB ports fail. When that happens, all the
> >> USB ports on the computer, fail to operate. No plugged in device
> >> will be recognized at all. You would not see any activity in UVCView.
> >> In extreme cases, there will be a burn mark on the Southbridge chip onthe
> >> motherboard. But many of the ones reported to have
> >> failed, don't have the burn mark - and that is good, because
> >> if the chip is not burned by the failure, the computer
> >> continues to be bootable. When it burns, it is finished, and
> >> won't boot again. (I get to worry about this, because I have
> >> that chip on my motherboard :-) )
>
> >> * * Paul- Hide quoted text -
>
> >> - Show quoted text -
>
> > Hello Paul...sorry for the delay, been very busy the last several days
> > to visit newsgroups. I did try to download the UVC view.x86.exe. but
> > never been able to finish downloading this file as it tends to hang up
> > when its about 65-77% of the program has been downloaded. And it
> > cannot be refreshed either as it just start from the beginning. I have
> > done this so many times....but failed.
> > Therefore I can't evaluate my USB drive.
> > Is there any mirror for these *site?
> > BTW, I was starting to think about the efffect of static electricity
> > on *some computer hardware and got worried that this particular flash
> > drive got it.
> > The PC that I plugged my USB ( i found out later was home built). What
> > is your opinion on this?
> > Thanks
> > Roy
>
> If the PC is home built, there is a small chance the port is miswired.
> But the owner would have his/her pile of dead USB devices, if that
> were the case.
>
> As for UVCView, the page used to be on the Microsoft site, and was probably
> there for a while. It could have been part of some SDK or kit that goes
> with a Microsoft product, so there are alternate ways to get the tool.
> I was surprised to find that the page was still available on web.archive.org ,
> so I've been pointing people there to get a copy.
>
> For the download link itself, this would be the index page. The archive.org
> site took snapshots five times. And what usually happens, is it actually only
> archives one copy (as long as the other four are detected to be duplicates).
> So clicking any one of the five links here, should start a download. Maybe
> you'll get lucky.
>
> http://web.archive.org/*/http://down...download/e/b/a...
>
> I clicked on the May 9, 2006 link just now. There was a slight pause, before
> the dialog came up to save the file. The file downloaded in about five seconds,
> and file size is 167,231 bytes. I have another copy which is 167,232 bytes.
> Both seem to work OK. The bigger file has an extra 0x00 byte at the end of
> the file. The above executable will run the program immediately, without
> installing anything.
>
> Good luck,
> * * Paul

Hello Paul
I was able to downloaded the file and immediately run it but
regardless if the USBflash drive plugged is suspected to be defective
or intact , it does not react...Is there a special way to run this
software?
Thanks
Roy