I was searching through the internet trying to solve this problem and saw an answer in this site and it looked you really now about this subject. Of all the other webs I checked, this one seemed that had a better solution. I tried to understand the process you answered to someone else using TestDisk but wasn't really sure if it applied to my case. I don't know how rewriting of the corrupted sectors can restore the partitions, cause I'm a novice concerning HDD repairing. Now I'll try to explain the details as clearly as I can. Hope you can guide me a bit.
This IDE HDD is one I had as internal HDD in my PC with Windows XP. One partition was for WinXP and the other for general files. Once I traveled, I took this HDD with me and bought an USB/IDE-SATA adapter. I used 2 times with a Windows 7 laptop and the 2nd time it presented problems. W7 would ask me to format one of the partitions, which was weird because I only used it play mp3's (Partition 2) and used .lrc files (Partition 1). Then I just ignored that request cancelling it and when I was done, I just shut down properly and disconnect everything likewise.
After I got back (didn't use it since), I tried to plug it in the same way in a W7 laptop, hoping it had been a lapse last time and now "fixed" itself. It didn't and all the HDD now appears as unallocated.
Until yesterday, I was really hesitant for not having done this in the past. I have decent knowledge in computers, but I care about my data, so I didn't do anything until yesterday when I started to do scans with EASUS Partition Master, MiniTool Partition Wizard and now Paragon Partition Manager (scanning for Partition Recovery) . With the first two I did Quick and Complete scans with no results and with Paragon already did the Quick one and now, like 1 hour ago, started the Complete Scan and so far it hasn't shown any progess at all. I did use TestDisk once for this problem, but I didn't know much about its tools, so I didn't risk it. By the way, I'm using WinXP and have a brand new external USB HDD if backup needed.
How do I get these partitions back?