Turning external USB hard drive into CD drive?

[G5Unit]

I have an older housing for an 80gb hard drive that I no longer use. Yet recently I decided I needed a second disc drive on my PowerMac.

So I took an old CD drive out of a 2002 dell and hooked it up to the connections on the inside (IDE I believe?) of the now empty external hard drive casing.

The connector looks like this:

The CD drive gets power, yet when I plug it into my PowerMac, nothing happens.

Is what I'm trying to do even possible? I'd love to know!

 

[After G]

Should be possible. I'd check the CD drive jumper and make sure it is set the same as the hard drive.

 

[OllyW]

Have you also connected the power cable to the CD drive, it looks like this....

 

[G5Unit]

Have you also connected the power cable to the CD drive, it looks like this....

View attachment 191624

Yes I have that connected as well, the drive is getting power.

I went to see if the jumpers were the same and saw that the CD drive has only 3 rows of 2 pins, while the Hard Drive had 4 rows of 2 pins.

Is it still possible?