Slack 10.1 can't mount usb thumb drive

[Cyber Source]

2.4 kernels had some real issues with USB, as did the early 2.6 kernels. 
dmesg and /var/log/messages should tell you the story, check them after 
inserting and taking out.

Frank Kumro wrote:

>I just installed slackware 10.1 (removing FC3) and currently its
>running the 2.4 kernel (ugh). When I try to mount my usb thumb drive i
>get the below error. I remember very clear that this did work on FC3
>and FC used the 2.6 kernel. Is there a different way to mount in 2.4
>kernel? I also tried sda and sda1-xx. All returned the following
>error. Yes the disk is formatted for use on both windoze and linux and
>there are files on it. Any help would be great!
>
>bash-3.00$ sudo mount /dev/sda1 /mnt/usb/
>mount: /dev/sda1 is not a valid block device
>
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