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

Posted on 2009-04-27
Last Modified: 2012-05-06
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?
Question by:wmccann04
    LVL 82

    Expert Comment

    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

    Author Comment

    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.
    LVL 82

    Accepted Solution

    Is the full size of the disk recognized in the BIOS? If not, you'll have to look for a BIOS upgrade for your machine, your current one probably doesn't support 48bit LBA; note the other prerequisite:
    "* A computer with a 48-bit LBA-compatible Basic Input/Output System (BIOS) installed."
    LVL 70

    Assisted Solution

    With both SP4 and the EnableBigLBA registry key, you've definitely got 48-bit logical block addressing added to your 2000 installation.

    This would normally mean the BIOS only supports 28-bit LBA's ... but this system is relatively new AND it shipped with up to 160GB drives (which means it clearly has 48-bit LBA capability) ...

    ... so I suspect you simply need to delete the 128GB partition you created when you first initialized the drive and repartition the drive.

    Go to Disk Management and see what it shows for the drive -- I suspect you'll find a 128GB partition and a bunch of unallocated space :-)     Just delete the 128GB partition;  then repartition the drive to get the full 1TB of capacity.
    LVL 70

    Expert Comment

    ... 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.

    Author Closing Comment

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

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