External USB HD doesn't appear on OSX 10.3.9

Hi everybody,
I use three iMacs, only one updated to Leopard. I use a Freecom 400 Gb HD for Time Machine. Works ok. However, when connecting the HD to one of the other iMacs running 10.3.9 the HD will not mount. Is there a solution to this?
Hans

The Time Machine disk is probably using the GUID partition table. Only Macs running 10.4 or later can mount such disks.
Technical Note TN2166

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Message was edited by: jinglada
Message was edited by: jinglada

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