For the sake of something that is so important to you, I would pay to how much it takes. There is an important documents in there.
As long as the shop can get it back and knows what to do to fix it. Sometimes you have to keep your fingers crossed in believing that everything will be fine during your HDD is repaired.
In the last 2-3 years, I have only change 2 hard disk. Before this Maxtor, I use Western Digital. Countered quite similar problem. But that hdd was a hardcore. I use to carry it around everywhere like a pen drive

But my this Maxtor is different. It was there in the computer casing, attached it nicely with a screw driver. Duh~...how can someone say it's a virus messing up with it?
I'm too busy to look down for shop or company to recover or repair the hdd. But I'll try and I am trying now.
Let me make it clear that my HDD are unable to detect during BIOS test. It says NONE. But after shutting off the plug and turn it back on again, turn my pc on later, during BIOS test, it seems like BIOS was trying to detect my hdd at first for a few seconds and then says "......NONE".
I will try go now to Maxtor site for the powermax utility. I think you mean I have to set it to slave for my problem Maxtor (20 gigabytes). I have a primary master hdd, Fujitsu (only 4 gigabytes). And then run the utility for a check.
Like Chiguy had said. I agree with you so much, with the right equipment etc and send it over to a company that you trust. I'm sure that my data is not lost but just want my Hdd to run fluently again. Then now I am confident that a hard disk, can be fixed. I thought it was quite an impossible for a hard disk to survive such mess.