My new internal hard disk thinks it's external. How can I reconfigure it?

I have just installed an additional hard drive for extra storage but my utilities (such as Parttition Magic) think it is external. It works perfectly OK but is is obviously not right and I'm not confident I won't lose something eventually. How can I make it 'internal' without destroying what I have on it? The data so far is backed up elsewhere.
Advice welcome
David

 

Question(s) only.

Isn't there an actual difference between and Internal and External drive ?

Could you actually have a drive meant to be external.

Answers here will help me also as I am also thinking about an External.

For me that would be a new territory not previously visited.

BillyBob

 

More Questions ....

How is it jumpered?
How is it cabled?
How was it formatted?
Was it FDISKed?
Is your MB normal (2 IDE's) or something else?
Any active Partitions on that puppy? (getting ahead of myself)

 

Internal/external drive

It is jumpered as 'slave' (additional storage)
It was formatted using 'discWizard' with one partition (Seagate)
It is cabled via free power supply cable and the 40-pin disk interface connector inside the case. The actual disk is ******* into a free bay.
David