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I have a new 160gb wd hd and when I install xp it does not recognize that I have a hard drive and says there is no hard drive. bios does recognize it. I also tried to reinstall windows on my old hard drive which really works fine but xp says it there is no hard drive, but when I take out the xp disk I can boot to my old hard drive fine. I only bought a new one because I was trying to reinstall windows and it didn't recognize my hard drive and I thought there was something wrong with my hard drive but now it does the same thing with the new one

Sometimes you have to enter a ide device in more than one place in the bios.
e.g. one to put in the params and in another to enable the device.
Also if there is already a device on the same interface cable, possibly its straps may require changing.
e.g. from MASTER to MASTER WItH SLAVE.
Advise how you get on.
Good Luck - Keep us posted.

In addition to the above, is the drive a SATA or IDE type? If SATA you may need to connect to a particular SATA port in order for the drive to be bootable.
Watch the startup screens to see if the drives are identified by model number.

it's not sata (thin blue connectors, right?). I believe it's just eide
I read something about lg disk drives over 127gb- what's that all about- is this maybe the problem

How new is your computer? You are referring to 48bit LBA compliance. Look at the link below for more info on this topic.
http://www.48bitlba.com/index.htm

Some WDigital IDE drives have a jumper setting for Master alone, which is used if the only drive on that cable.
It is rare that the MBoard maker have a BIOS update to make the IDE controllers 48bit compliant. Wouldn't hurt to look into it though. I think that you have a different issue though. If your board wasn't compliant the usual thing that occurs is the drive is shown as 127/137GB capacity. If yours isn't showing up at all I would guess your problem is in the controller, cable or jumpers. IDE ribbon cables are delicate. You should be using an 800 wire cable. You can tell by the color of the connectors. 80 wire cables always have a colored MBoard end connector. Blue, red, yellow, etc. The other end is black and the center is grey.

but what gets me is that I already have windows on the old hard drive and I can boot fine. I can surf the net and do whatever I want. It's just that when I try to reinstall windows using the disk- the disk doesn't detect it. I've tried using 2 other xp disks and I get the same result. If something wasn't compliant or compatible then why can I boot to the existing windows that's already on it

You need to quit speculating and answer the questions. How old is your computer? Some Dell computers prefer jumper settings using CS (cable select). When using CD you will need to connect the drive to the end of the cable and connect to the lower number IDE controller.

it's about 4 years old, p4 and the hard drive is connected already. The way it's connected is working. I have too much crap and want to reinstall a fresh copy.

When you first start the computer do you see any screens that show the processor, RAM, drives, BIOS version, etc?

"yes it shows all". Dows that mean the drive in question also shows in those screens by model number?

Well if that is the case then your drive is being recognised by the BIOS.
Go to Disk Mangement in WinXP to find your lost harddrive.

I hate to butt in here, but since this is a dell box and dwin is probably using a Dell restore' CD, I 'wonder' if the disk is not being recognized because the drive doesn't have the Dell restore partition.

It appears the drive IS being recognised. The BIOS knows nothing about what OS or anything on the drive. The BIOS attempts to read the firmware on the drive and configures from that data. The OP states the drive model appears in the startup screens.
dwin
What exact type of disk are you trying to use to install WinXP on this computer? Have you ever used that disk before?
Describe how you are trying to install WinXP. Give details.

Yes Othehill, I saw that the drive was recognized by the bios. What I was suggesting is, that if he is using a Dell restore CD, the Restore program might not recognize the disk if it doesn't have the restore partition.
I'm gonna back out now. Sorry for interrupting.

aegis, sorry about that, I didn't understand what you meant. No need to back out. If you have something else to offer by all means do so.
The OP stated the original drive would not accept a Windows intall either.
Need more info from the OP.

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