I have a Linux RH 7.3 system. I am pretty sure the system sees my USB hub as well as my USB HD. If I dmesg > boot.messages I can find it detecting the hub, iniitializing USB Mass Storage device, assigning scsi emulation at scsi0, ending with "USB Mass Storage support registered."

However I can not mount it. If I make a mount point and then try to mount it my system freezes and I have to do a hard reboot.

Any suggestions?

Thank you!

Are you trying to mount scsi0? Is there the device /dev/sda present? If so, try mounting that instead.

Thanks Grant! I was mounting the correct device but I think because
it was originally formatted windows that is causing the problems I have been experiencing even using the MSDOS option seems to cause it to hang.

I've also had problems with freezes when mounting a USB device in RedHat 7.3, in this case a DiskOnKey flash memory with hfs or ext2 filesystems. The device can be mounted with "mount -t hfs /dev/sda /mnt/diskonkey" after the computer is first started but then removing the flash memory, reinserting it , and attempting to mount it again causes a freeze. Oddly enough, running "cdrecord -scanbus" before mounting gets rid of the problem. I've seen recommendations to remove and then reinsert the usb-storage module as a solution but didn't have success with it. Obviously there's a bug here somewhere. Does anyone have any ideas?

Please tell me, Broose, that you unmounted it before yanking it out of the usb port?

Yes, I used "umount" and also tried "umount -d -l". Sorry, I forgot to include that detail in my message.