[clue-tech] FC5 Computer does not recognize Memorex 1 GB Thumb Drives

[bof]

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.

I can mount both a Memorex 256 MB and Memorex 2 GB thumb drive. When one 
of these is plugged in I get these messages in /var/log

    scsi2 : SCSI emulation for USB Mass Storage devices
    usb-storage: device found at 46
    usb-storage: waiting for device to settle before scanning
      Vendor: Memorex   Model: USB2 ThumbDrive   Rev: 2.00
      Type:   Direct-Access                      ANSI SCSI revision: 02
    ready
    SCSI device sda: 512000 512-byte hdwr sectors (262 MB)
    sda: Write Protect is off
    sda: Mode Sense: 03 00 00 00
    sda: assuming drive cache: write through
    SCSI device sda: 512000 512-byte hdwr sectors (262 MB)
    sda: Write Protect is off
    sda: Mode Sense: 03 00 00 00
    sda: assuming drive cache: write through
     sda: sda1
    sd 2:0:0:0: Attached scsi removable disk sda
    sd 2:0:0:0: Attached scsi generic sg0 type 0
    usb-storage: device scan complete

and I can then mount the drive using the standard "mount" command.

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.

Any thoughts from anyone as to what is going on and how I can get the 1 
GB drives to work like the other ones?

BOF