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Assuming you already have SP2 or later installed, you still need a registry change; check this article for details:<br />
48-Bit LBA Support for ATAPI Disk Drives in Windows 2000<br />
<a href="http://support.microsoft.com/kb/305098" rel="ugc nofollow">http://support.microsoft.com/kb/305098</a><br />

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Assuming you already have SP2 or later installed, you still need a registry change; check this article for details:
48-Bit LBA Support for ATAPI Disk Drives in Windows 2000
http://support.microsoft.com/kb/305098 [http://support.microsoft.com/kb/305098]


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I have windows 2000 SP4. I added the value to my registry, did a restart and it still shows 127GB for the 1 TB drive.
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I have windows 2000 SP4. I added the value to my registry, did a restart and it still shows 127GB for the 1 TB drive.

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... I assume you know this, but just in case: &nbsp; To get to Disk Management, just right-click on My Computer; select Manage; and then click on Disk Management in the list on the left side (under Storage). &nbsp; You should then see your disk on the right side -- just right-click on the 128GB partition and select Delete; &nbsp;then right-click in the unallocated space for the drive and create a new partition that uses the entire drive.<br />

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... I assume you know this, but just in case:   To get to Disk Management, just right-click on My Computer; select Manage; and then click on Disk Management in the list on the left side (under Storage).   You should then see your disk on the right side -- just right-click on the 128GB partition and select Delete;  then right-click in the unallocated space for the drive and create a new partition that uses the entire drive.


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That did it. Thank you both for your help with my problem.
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That did it. Thank you both for your help with my problem.

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I trying to add another Hard Drive to my HP Compaq dc5100 computer. When I install the 1 TB hard drive Windows only recognizes 128GB. &nbsp;How do I get the entire 1 TB drive to be fully recognized?
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I trying to add another Hard Drive to my HP Compaq dc5100 computer. When I install the 1 TB hard drive Windows only recognizes 128GB.  How do I get the entire 1 TB drive to be fully recognized?

Installing a 1 TB internal Hard Drive on OS Windows 2000 Professional

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

Storage Hardware

Windows 2000 is an operating system for use on both client and server computers. It is the successor to Windows NT 4.0, and is the last version of Microsoft Windows to display the "Windows NT" designation. Four editions of Windows 2000 were released (Professional, Server, Advanced Server, and Datacenter Server) that shared a core set of features, including many system utilities such as the Microsoft Management Console. All versions of the operating system support NTFS 3.0, Encrypting File System, as well as basic and dynamic disk storage. The Windows 2000 Server family includes support for Active Directory services, Distributed File System and fault-redundant storage volumes.