Hard drive will not mount - SMART STATUS "not supported"

I was in the process of "sanitizing" an iMac G5 last night by erasing the data with Disk Utility and the hard drive is not not recognized...and some alarming noises periodically come from the drive.
Is there something else I should try to determine if the drive can be saved? (never had trouble before.)
Failing that, how do I determine which drive I should order as a replacement (250 gig,) and from where?
Thanks!

If you are hearing noises from the HD, then I suggest that oyou start backing up.
Which "model" & "generation" G5 iMac do you have?
Need this info so that the knowledgeable users can provide you with the proper troubleshooting solution(s).
http://docs.info.apple.com/article.html?artnum=301724-en How to identify your iMac
http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh355.html Getting information about your computer
You can have this info displayed on the bottom of every post by going to 'My Settings' which is located in the column on the right under your name, and filling in the information asked for.
Thank you
If you have the iSight model, you will need to take your computer to your nearest AASP. The iSight models (except for RAM installation) are not user repairable & will void the warranty if attempted.

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Message was edited by: hempomatic

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Hatter,
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http://discussions.apple.com/thread.jspa?threadID=1638087&tstart=0
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Thanks for using Apple Support Communities.
For more information on this, take a look at:
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http://support.apple.com/kb/HT3746
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I worked on behalf of HP.

Hard drive will not mount - SMART STATUS "not supported"

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