Why doesn't my iMac see my external drive?

I have an iMac 20" 2.16 Core 2 Duo. The machine is operating fine. That's not the issue. I am trying to plug into it a 1TB Maxtor external drive that I used on my G4. The problem is the external does not show up on my iMac. I have tried using disk utility, but it doesn't see the drive. Here's the kicker. When I do System Profiler, it is seeing that the external drive is there. I have tried it through both the Maxtor's firewire and USB connections. In either connection, the System Profiler sees the drive. My question is how can I access it?

Hello
have a look at seagate support pages"External Hard Drive Troubleshooter for Mac OS" , here
http://seagate.custkb.com/seagate/crm/selfservice/search.jsp?DocId=213059&NewLan g=en
Pierre

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