- Vista, XP, 2000, 98 Install, reinstall and repair guides


Large Hard Drive Support  (48 bit LBA) - 137 GB plus for Windows 2000


1 - 48 bit Bios Support - 2 - Windows Support - 3 Registry Support

4 - PCI ATA controller card - 5 - Software Help



1 - 48 bit Bios Support 


First thing you must be aware of is the need for 48 bit support from your Bios, which is located on your motherboard. Without this your large hard drive will not be fully seen. This will mean installing the latest bios update from your computer manufacturer, or motherboard manufacturer.


There is many ways to determine your bios version, and motherboard make.

To find out the version and mainboard download a file called CPU-Z. It can be found here: 

. It can tell you a lot about your system.

As you can see by the above image, that my laptop motherboard is made by Hewlett Packard and the version of the bios is KF_KH.f.05. So I went to the HP website, found my computer make and checked out the files. The latest BIOS version for me is KF.KF.F.14. Note the slight difference in the coding, that's why it's best to go to the site and look under the model of your machine or from the model and make of your motherboard.

OEM Motherboard Bios: If the computer is OEM then the best thing to do is to phone the computer manufacturer or go to their website. Be careful that you do this because using a 3rd party BIOS upgrade could leave your OEM version of Windows dormant.

On their website check against your machine make and model number to find bios files available for it and also the make of the motherboard. 

FULL Motherboards Bios: To get the correct bios for your motherboard, just go straight to the manufacturers website.

FINDING Type & Version: The easiest way to find the make and model of a motherboard is to look at it. Yes take the side off your computer and look inside. 90% of computers will have manufacturer and motherboard model printed on it.

To find out the version download a file called CPU-Z. It can be found here:

It can tell you a lot about your system.




2 - Windows Support


Windows 2000 support for 48 bit LBA requires installing Service Pack 2 or higher, and then it needs enabled in the registry. This will enable support for drives larger than 137 Gigabyte. 

Check out Registry changes by clicking here

Check Microsoft's page by following this link:

How to enable 48-bit Logical Block Addressing support for ATAPI disk drives in Windows 2000  

To download service Pack for Windows 2000 click on the appropriate link below:

Windows 2000 Service Pack 4Windows 2000 Service Pack 3  -  Windows 2000 Service Pack 2  -  Windows 2000 Service Pack 1




3 - Registry Changes




As long as your BIOS supports 48 bit LBA you can edit the registry in all versions of XP to check that XP is enabled for large HDD support:

Click Start, then Run and type REGEDIT and click OK

Go to the following path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\atapi\Parameters

Click on NEW then REG_DWORD, and set the value to 1 (On) or 0 (Off)

Also check out this Microsoft article:

How to enable 48-bit Logical Block Addressing support for ATAPI disk drives in Windows 2000    



4 - PCI ATA controller card


Check with the board version and make. If it supports it then, just do the windows update. If not then you need to buy a new card. Sorry there is no way around it.



5 - Software Help





 Download the Intel 48-bit LBA Test Program (ME & 98/98SE only)


Download Maxtor Big Drive Enabler  (This should run on most Computers, Maxtor Hard Drive or not)