[kubuntu] Detecting external e-Sata hard drive Ubuntu 9.10 without reboot

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I have an external e-sata hard drive that when I plug is does not show under /dev or fdisk -l. I always have to reboot my unbuntu box for it to detect and mount the thing. How do I manually detect it manually and mount it? Thank you! edit: oops. I can't type. err the title should read without reboot. The hard drive works great after a reboot. ()