Newly installed Ultra ATA hard drive not showing up anywhere-HELP!

Just installed (I thought) a 300 GB hard drive on top of my factory installed 40GB. Tried it once as the master and then as the slave. Still, it doesn't show up in disk utility so I can format it. I do not have it set for cable select.
Any help would be appreciated because I couldn't find a similar question in the past posts. Thank you!! ")

I thought it was a Sony but apparently only my CD drive is - I can't tell if it is a WD! Here's are the specs on it... Does that model # tell you anything about it?
ST340016A:
Capacity: 38.18 GB
Model: ST340016A
Revision: 5.21
Serial Number: 3HS5SPFX
Removable Media: No
Detachable Drive: No
BSD Name: disk0
Protocol: ATA
Unit Number: 0
Socket Type: Internal
OS9 Drivers: Yes
S.M.A.R.T. status: Verified
Also, the instructions I have don't tell me how to set up the old HD as master w/slave present. Currently, I have no jumper in the new HD and the old HD has a jumper in the master/single drive spot.
The instructions are more geared to a Windows PC of course. In the troubleshooting section is does talk about having to put a (capacity limiting) jumper on the pins all the way to the right for computers that do not suport high-capacity drives.
Now that I've had some sleep I'm going to get back down there and see if I can't refigure my connector situation.
BTW-yes, I figured out too late that I would not be able to use all of the GB on this drive. This is a learning process for me as I'm a busy mom of 3 boys-I generally figure things out in my "spare" time. Ha, ha! I so love .Mac and the support-what a lifesaver!
I HAD been wondering how difficult it would be to install the controller card. Is that something I can do down the road assuming I actually get my new HD showing up?
Thanks!

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okay, well here is the story:
my iBook G4 had its stock 30gb hard drive in it and it was running extremely low on space. so i figured i didn't want to carry around an external hard drive, therefore i would buy an internal hard drive an install it. so i purchased a new 2.5" 80gb hard drive and called up the local apple store. they told me that although it was under warranty, that it did not cover hard drive installation. so i looked it up online and found step by step instructions to install the hard drive. so after lots of hard work and many screws, i installed the new hard drive successfully... but i still had this perfect 30gb hard drive. i thought maybe to save a few bucks i could turn it into a usb external hard drive. i found an enclosure for the hard drive and a usb 2.0 cable and plugged it into my ibook. it was recognized and everything. i put some files on the external hard drive and transferred it to another mac. this is where the trouble started. i plugged the hard drive into a PowerMac G4, and it was not recognized... so i tried it on a different mac. this time on a PowerBook G4, but no luck. this issue has been troubling me for a few weeks. but then i tried it on a similar iBook G4... and it was recognized. but i don't know why it was only recognized only on the iBook G4 (not the same iBook G4 it was pulled out of) and no other macs.
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iBook G4 Mac OS X (10.4.3) 512 MB Ram, CD-RW Combo Drive, 40 Gig HD, bought in October of 2005...
Message was edited by: Hilary_Rose

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Newly installed Ultra ATA hard drive not showing up anywhere-HELP!

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