Domain users are unable to access their USB external hard disks when connected to 2003 R2 (64 bit) member servers. Have modified permsisions \windows\inf\usbstor.inf so users and power users have modify write and read permission. They can access usb memory stick OK, but not usb external hard disks. The hard disk does not get a drive letter. The usb memory stick does get a drive letter OK. If they connect to XP client, they can access the external usb hard disk OK.
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