[lug] FC5 Computer does not recognize Memorex 1 GB Thumb Drives

[Zan Lynx]

On Tue, 2007-01-02 at 10:24 -0700, bof wrote:
> Hello,
> 
> I have three 1 GB Memorex thumb drives that are not recognized under
> Fedora Core 5 on my desktop system, and cannot be mounted using the
> standard command "mount -t vfat /dev/sda1 /mnt." When this command is
> issued, it returns an error message "mount: special device /dev/sda1
> does not exist". The thumb drives in question can be used on the same
> computer when running Windows XP, and are mountable on several other
> computers running FC5 and FC6.
[snip]
> However, when one of the 1 GB drives is plugged in, I get these 
> messages in /var/log/dmesg and in /var/log/messages
> 
>     usb 1-1: new full speed USB device using uhci_hcd and address 125
>     usb 1-1: new full speed USB device using uhci_hcd and address 126
>     usb 1-1: new full speed USB device using uhci_hcd and address 2
>     usb 1-1: new full speed USB device using uhci_hcd and address 3
> 
> These messages go on indefinitely until I unplug the thumb drive, and
> "the special device /dev/sda1 does not exist" error message occurs 
> when I issue the mount command.

I saw the same sort of problem with a cheap 16 MB USB flash.  I was
using it in a Belkin USB 2.0 hub, and it would give the same sort of
messages.  It was sort of like it tried to upshift it to USB 2.0 and
failed.

It worked for me when I plugged it into my laptop's USB 1 port directly
instead of the hub.  I've got USB 1 on the right side and USB 2 on the
left.  Don't know why Compaq did it that way but it worked for me in
this instance.

I suppose that if you have no USB 1 ports you could try unloading the
EHCI driver module.
-- 
Zan Lynx <zlynx at acm.org>
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