Possible? Connect a firewire HD to 2 systems?

[TonVanHest]

I was not able to connect my Cube with a regular firewire cable to the 
iMac because the cable was too short. So I connected the cube to the 
external firewire Maxtor drive that I have, which in turn was connected 
to the iMac.


+------+
|  Cube    |
+--+---+
        |
        |
+--+---+
|              |
| Ext. Hd  |
|              |
+--+---+
        |
        |
+--+---+
|             |
|  iMac    |
|             |
+------+

Now I am wondering. Would it be possible to keep this connection when 
both systems are used seperately? I understand there is going to be big 
problems if both systems would access the same files at the same time 
but this is controllable by me because I do not expect that Apple will 
do file/record locking.

The important thing is that both systems must write changed data right 
away. I.o.w. not keep anything in a memorybuffer.

Anyone experience with a setup like this?