Hidden NTFS partition in an external hard disk
Good morning guys! I have a problem with my external hard disk with a hidden NTFS partition. I have a custom built Shuttle PC – dual core 2.2 Ghz, 2 GB RAM, ATI DVI Graphics, 2 SATA hard disks (160 and 250 GB). I have an external hard disk enclosure made by Sumvision. It contains 2 (two) 500GB Maxtor hard disks too. This unit allows you to have the disks in a Raid 1 configuration which duplicates the data between the two in case of a failure. I have always been using Windows Vista Ultimate in my computer. It’s been useful for some of my IT works.
I always test some software and other applications before we roll it out. I installed it in my PC and everything worked just fine. I have done this installation when I had my new external hard disk. I initialized the disks using disk manager, and formatted the full 500GB, copied the data and all was fine.
Last week I removed Vista because I wanted to go back to XP and copied all my data off. After I deleted Vista, I formatted the partition where it was previously in. Then I installed XP Pro. I made a setup in XP and everything was fine. After the setup however, when I tried to plug in any of my external hard disks, they show up in Disk Manager as having a Hidden NTFS partition. I removed the data off the disk using Acronis and copied it to my hard disk. I got my data back. Afterwards, I deleted the partition and erased the data. I created a new Primary Partition for the full 500GB. I formatted the disk and it showed up as one with a full 480GB partition.
Next, I designated the drive with the letter ‘X’.  After I did a reboot on the computer, the hard disk partition which was visible was hidden again. I then needed to delete the partition and start all over again. I have tried using Partition Magic to activate and unhide the Partition, though I needed to restart from PM to get it activated. However, it didn’t work too. I really need your help on this as it is very tedious to do it all over again without avail! Thank you in advance.