Can't repair or partition internal hard disk with disk utility

Hi,
For the past couple months I've been trying to repair and (re)format my second internal hard disk. It stopped showing up on the desktop after I attempted to install leopard on it. Until then I'd had no problems with the disk for the two years I've had it Leopard installed fine on the other smaller internal disk. But the second disk only shows up in disk utilities - it doesn't have any volumes. I can't verity the disk because the button is greyed out as is the repair disk button.
S.M.A.R.T. Status shows "not supported".
Partition Map Scheme shows "unformatted".
Whenever I startup my computer I get a dialog box stating "The disk I have inserted is unreadable by this computer". I't referring to my 250gig internal disk. I read some posts here that suggested using OS 10.4 disk utility to format but that doesn't work either.
At this point I'm totally lost as are all the files I had on that disk - I initially erased it back when I attempted to install leopard on it. Does anybody have any ideas how to fix this?
Thanks for any and all help

Hi V.K.
Thanks for the advice. Luckily I don't have any data on it since I wiped it clean back when I attempted to install leopard on it a couple months ago. I'm really amazed that it only lasted two years compared to my 80gig which has been in use [daily] for at least five years. I hardly ever used the 250gig drive. I ordered another (500gig) drive from Western Digital which I expect to be here in a couple days. In the mean time I guess I'll get out my hammer.
Thanks for your help.

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Extended Hard Drive Preparation
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Dear Mac Book Users
To begin with I got a problem of spinning wheel and grey screen, upon extensive research online i could,nt find any solution and everytime i tried to repair it with disk utility's first aid otion i got the following error:
Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
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Please check the results:
Last login: Thu Aug 30 11:34:15 on console
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1. Boot from your OS X Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu.
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The words you quoted are supposed to usually mean they
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Some companies doing that kind of work, who don't have
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In some areas, with more than one company listed in the
page resource I cited, some of them are product specialists
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The post linked to in your earlier inquiry, where someone
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And a skilled tech, with that kind of information, may be
able to replace an iBook's hard disk drive; but some who
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Some areas of the world are harder to find the resource to
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No body did the work in my area, or if they really did, charged
more than twice what I paid including shipping it both ways.
More than 5,000 miles. Since then, sold, the iBook still works.
Unfortunately sometimes good qualified service is where
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comparison, has almost no people; just great natural beauty.
Hopefully someone or another you contact can refer you to
a reasonably fine shop of careful people who are qualified.
You may have to ask around, and perhaps expect the iBook
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PS: are there any indications of an "apple user group" of
interested owners who have, use and meet to discuss their
shared community of those interests, in your area? If so,
sometimes people who get together like that know more.
Good luck & happy computing!

Can't repair or partition internal hard disk with disk utility

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