For those having problems mouting usb harddrives with 10.4.10 this solves it. The problems lies with the 10.4.10 usb drivers replacing them with the older 10.4.9 drivers returns your harddrive.
1 download pacifist
2 download 10.4.9 combo update and 10.4.8 combo update if the 10.4.9 update fails.
3 open the 10.4.9 Combo Updater with Pacifist
4 in pacifist go to /system/library/extensions
5 install IOHIDFamily.kext
6 install IOUSBFamily.kext
7 reboot and enjoy
1 download pacifist
2 download 10.4.9 combo update and 10.4.8 combo update if the 10.4.9 update fails.
3 open the 10.4.9 Combo Updater with Pacifist
4 in pacifist go to /system/library/extensions
5 install IOHIDFamily.kext
6 install IOUSBFamily.kext
7 reboot and enjoy