[CLUE-Tech] Mounting LEXAR Jumpdrive

[R. Savage]

I'm using RedHat Dist 9.0, Shrike, on a couple of 200 MHz Pentium I 
computers. In order to transfer files (and also backup files), I have a 
couple of LEXAR 64 MB Jumpdrives, mounted in USB 1.1 extension hubs (so 
I don't have to crawl under the desk to insert and remove).

The jumpdrives mount cleanly when needed with the "mount" command (mount 
-t ext2 /dev/sda1 /mnt/LEXAR); they are not automounted from fstab, 
since I need them only occasionally. I login as root most of the time.

The problem is, after saving files to the jumpdrive, the "unmount" 
command (umount /dev/LEXAR) doesn't work. I get the "device is busy" 
response. Switching to other directories doesn't help; /dev/LEXAR stays 
"busy". The only solution seems to be to shutdown and restart - a minor 
inconvenience for the safety/backup involved. But it bothers me that I 
don't understand this behavior, and my status as "root" seems 
ill-defined. Can someone tell me what I'm doing wrong? Is this just 
normal behavior for a block memory device after mounting?

Thanks.

Dick Savage
Franktown