I'm adding a couple lacie external USB drives to my CentOS 5.3 system and running into a few issues... when I connect them, I see the following in dmesg: usb 1-1: new high speed USB device using ehci_hcd and address 11 usb 1-1: configuration #1 chosen from 1 choice And that's it. No device assignment information, the usb-storage module does not appear to be loaded and I am unable to access the drive. I do see the following in lsusb: Bus 001 Device 011: ID 0451:6250 Texas Instruments, Inc. I'm assuming the kernel or udev doesn't know what to do with the given device ID and isn't correctly mapping it to the usb-storage module (I have manually loaded usb-storage with modprobe usb-storage prior to attaching the device). I found a post describing how to manually map a vendor id / device id to usb-storage, but it has to do with the old hotplug system from CentOS 4. Can anyone advise me on how I can tell my system the above device is a mass storage device? Do I need to write some udev rules? These drives work fine (automatically) on a Fedora 10 machine. Also, I am using the "plus" kernel on my CentOS machine. Thanks, Ray