Ted Gould's suggestion to try sdc1 worked like a champ, but I'm very
glad to hear about usbview and will certainly get it.
Thanks!
-mj-
Alan Dayley wrote:
> On Monday 11 October 2004 05:09 pm, Mark Jarvis wrote:
>
>>Nope. One device is a standard flash memory "thumb" or "lipstick"
>>drive. It plugs into a standard USB port. The other device is [a SD
>>memory card more-or-less permanently inserted in a SD card reader].
>>(Note brackets.) The SD card reader plugs into a standard USB port.
>>
>>It's equivalent to swapping two std. flash drives in one USB port and
>>works the same at home (both a SCSI drive & a USB drive present) and at
>>school (just USB). First drive seen always works. Second(swapped in)
>>drive always fails. Haven't played around with it as much at school, but
>> get basically the same results when using my flash drive & a borrowed
>>drive.
>>
>>I shouldn't have mentioned the SD card. Don't bother going there. If the
>>SD card/reader combo is seen first it works fine. The issue is swapping
>>two (or more) USB flash memory drives in & out of a single connection
>>point.
>
>
> OK! Now I understand. Now we can proceed as I would proceed.
>
> First, we need to see what the USB is doing as you connect and disconned the
> USB device. The best way to do that, in my experience, is to use usbview.
> It is a utility that displays a "tree" view of the USB connections and
> devices. You can watch as you plug something in and as it goes away when you
> remove it. You might have it already but I have always had to install it
> separately. Try http://www.kroah.com/linux-usb/. I have always had good
> luck with the binary RPM file or you can install and build from the source.
>
> Now, boot your computer without any devices plugged into the USB. Start
> usbview and position it so you can see it. Now plug one of the devices into
> the end of your cable. It should get loaded into the USB tree view and be
> identified, etc.
>
> Now, disconnect it from the USB. It should disapper from the USB tree. If
> not, that is the problem. The hotswap is not removing the device.
>
> Now, connect the other USB device. It should come up in the tree view with
> it's own unique information. If it does not, the hotswap is not adding the
> device.
>
> Now (I'm saying "Now' too much), we will have to figure out what to do next
> based on what you learn here.
>
> As an aside, I have found USB to be unstable on some computers. I have a
> Compaq computer here that will not reconnect a USB device on any port that
> already had a device connected. Everything is setup "right" but if I sync my
> palm on one port and then try to plug something else in that same port, the
> something else will not be seen. On that particular computer, the only way
> to reset that bogus USB situation is to reboot (yuck!). I did not dig
> further to solve it since, at the time, I just left the printer plugged into
> it's port and only used the other for my palm.
>
> I guess what I am saying is that to really solve the problem, we may have to
> venture deep into the driver tree before we are done. Just a small warning.
>
> Alan
>
>
>>BTW, having trouble getting one student's Memorex flash drive to work at
>>all. (Other students' flash drives are OK.)
>
>
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