I can't see my hard drive

[gogos]

Dear all,

I have a problem with my hard drive. In my old system I had 2 hard drives. The first one was 120G (with 2 partitions - 30G and 90G) and the system installed in the 30G. The second is a Maxtor 200G.
After formatting the system partition (30G) and re installing windows xp in thew same one I can't see my 200G drive. In fact I can see it in the boot screen while pressing pause, but in fdisk there is no partition letter or under my computer I can't see anything. In device manager it says it is working properly. The second partiton (90G) is fine. Also the cables seem fine. I also used the same type of connection.
Primary master the 120G, primary slave the 200G, secondary master dvd writer, secondary slave dvd rom.

I have to mention that I really need to keep the 200G without formatting as I have important files in it.

Thanx for any help.

[Coconut Monkey]

How is the 200Gb drive connected? If it's SATA, then you will have install the required SATA controller drivers in order for Windows XP to see it (unless you have a native SATA motherboard, such as one using an Intel chipset).

Otherwise, you might have to give Windows a gentle push! Make sure you're logged in with your administrator account, and head into Control Panel, Administrative Tools, Computer Management, Disk Management. On the right you should see a list of drives, with your 200Gb drive somewhere within. "Activation" may be required by right clicking its entry and choosing the right option (I'm not sure which).

[gogos]

My system is
AMD athlon xp 2600
512
qdi kudoz7x/600-6a
they are connected with IDE and are ATA.

Now in device manager it says that
IDE ATA/ATAPI controllers
Primary IDE Channel
Secondary IDE Channel
VIA bus master IDE Controller

all three are well and running

In disk management It says that drive is unreadable.